Mason363 · Oct 23, 2026 · Oct 23, 2026 · Oct 23, 2026 · Oct 23, 2026 · Oct 23, 2026
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -86,6 +86,7 @@ jobs:
           make -C games/doodlejump host test
           make -C games/stickmanhook host test
           make -C games/coreball host test
+          make -C games/uno host test
 
 
 

diff --git a/Makefile b/Makefile
@@ -18,7 +18,7 @@ PY ?= python3
 CARGO ?= cargo
 B = build/data
 # Conventional games honor a configurable output directory; special layouts are kept local.
-GAMES_REDIRECT = balatro blockblast breakout buckshot celeste championisland chess connectfour cookieclicker coreball dinorun donkeykong doodlejump doom dune finalearth2 flappybird flappydunk fnaf g2048 hillclimb hollowknight invaders isaac jetpackjoyride leveldevil minesweeper monkeymart numblocks numpowder numvisuals pacman portal pvz snake sokoban solitaire sonic stickmanhook subway sudoku suika tombofthemask towerblock twoplayer undertale uttt
+GAMES_REDIRECT = balatro blockblast breakout buckshot celeste championisland chess connectfour cookieclicker coreball dinorun donkeykong doodlejump doom dune finalearth2 flappybird flappydunk fnaf g2048 hillclimb hollowknight invaders isaac jetpackjoyride leveldevil minesweeper monkeymart numblocks numpowder numvisuals pacman portal pvz snake sokoban solitaire sonic stickmanhook subway sudoku suika tombofthemask towerblock twoplayer undertale uno uttt
 GAMES_OUT = dinorun
 GAME_REDIRECT_ARG = $(if $(filter $(1),$(GAMES_OUT)),OUT=../../$(B)/games/$(1),BUILD_DIR=../../$(B)/games/$(1))
 # the RAM the oldest calculator software that runs apps gives them (23.2: 148928 bytes; 25.2 gives 153676).
@@ -29,7 +29,7 @@ RAM_LIMIT = 148928
 # custom builds of Epsilon 25.2's source give apps less: 133652 bytes; every game fits there too, in NumPlay and on
 # its own (their big buffers are on the stack, 32 KB apart from that RAM, or in the RAM the software has left)
 CUSTOM_RAM = 133652
-BIG_APPS = Celeste HollowKnight Undertale ChampionIsland FinalEarth2 NumPowder NumBlocks NumDrive SubwaySurfers FiveNightsAtFreddys Doom BindingOfIsaac HillClimbRacing PlantsVsZombies SonicTheHedgehog CookieClicker LevelDevil JetpackJoyride StickmanHook DonkeyKong Dune MonkeyMart TombOfTheMask
+BIG_APPS = Celeste HollowKnight Undertale ChampionIsland FinalEarth2 NumPowder NumBlocks NumDrive SubwaySurfers FiveNightsAtFreddys Doom BindingOfIsaac HillClimbRacing PlantsVsZombies SonicTheHedgehog CookieClicker LevelDevil JetpackJoyride StickmanHook DonkeyKong Dune MonkeyMart TombOfTheMask UNO
 # the calculator's space for installed apps: from the end of its software (64 KiB aligned) to 64 KiB before the
 # end of its 4 MiB slot of flash, 0x903F0000. The software's size sets the start: 0x90200000 is the latest a
 # NumPlay counts on (1.94 MB, APP_SPACE); Epsilon 26.4 on an N0120 ends at 0x90180000 (2.44 MB, the
@@ -321,6 +321,7 @@ APP_donkeykong = $(B)/games/donkeykong/donkeykong.nwa:DonkeyKong.nwa
 APP_dune = $(B)/games/dune/dune.nwa:Dune.nwa
 APP_monkeymart = $(B)/games/monkeymart/monkeymart.nwa:MonkeyMart.nwa
 APP_tombofthemask = $(B)/games/tombofthemask/tombofthemask.nwa:TombOfTheMask.nwa
+APP_uno = $(B)/games/uno/uno.nwa:UNO.nwa
 # the big games' modules are made from these (the kit)
 $(foreach g,$(XL_GAMES),$(eval MOD_$(g) = $$(word 1,$$(subst :, ,$$(APP_$(g))))))
 
@@ -354,6 +355,7 @@ apps: | $(B)
 	$(MAKE) -C games/dune build NWLINK="$(NWLINK)" BUILD_DIR=../../$(B)/games/dune
 	$(MAKE) -C games/monkeymart build NWLINK="$(NWLINK)" BUILD_DIR=../../$(B)/games/monkeymart
 	$(MAKE) -C games/tombofthemask build NWLINK="$(NWLINK)" BUILD_DIR=../../$(B)/games/tombofthemask
+	$(MAKE) -C games/uno build NWLINK="$(NWLINK)" BUILD_DIR=../../$(B)/games/uno
 	cd games/tetris/tetris && NWLINK="$(NWLINK)" $(CARGO) build --release --quiet
 	cp $(word 1,$(subst :, ,$(APP_numdash))) $(B)/apps/$(word 2,$(subst :, ,$(APP_numdash)))
 	cp $(word 1,$(subst :, ,$(APP_crossyroad))) $(B)/apps/$(word 2,$(subst :, ,$(APP_crossyroad)))
@@ -385,6 +387,7 @@ apps: | $(B)
 	cp $(word 1,$(subst :, ,$(APP_dune))) $(B)/apps/$(word 2,$(subst :, ,$(APP_dune)))
 	cp $(word 1,$(subst :, ,$(APP_monkeymart))) $(B)/apps/$(word 2,$(subst :, ,$(APP_monkeymart)))
 	cp $(word 1,$(subst :, ,$(APP_tombofthemask))) $(B)/apps/$(word 2,$(subst :, ,$(APP_tombofthemask)))
+	cp $(word 1,$(subst :, ,$(APP_uno))) $(B)/apps/$(word 2,$(subst :, ,$(APP_uno)))
 	arm-none-eabi-strip --strip-unneeded $(B)/apps/Tetris.nwa
 
 STD_APPS = $(foreach g,$(STD_GAMES),$(B)/apps/$(NWA_$(g)))
@@ -456,5 +459,6 @@ clean:
 	-$(MAKE) -C games/dune clean
 	-$(MAKE) -C games/monkeymart clean
 	-$(MAKE) -C games/tombofthemask clean
+	-$(MAKE) -C games/uno clean
 	-cd games/tetris/tetris && $(CARGO) clean
 	-$(foreach g,$(STD_GAMES),$(MAKE) -C games/$(g) clean;)
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@
 
 <p align="center">
   <b>29 free games for your NumWorks calculator, in one app.</b><br>
-  Plus 21 big games that install on their own. For the N0110, N0115 and N0120, in English, French and Chinese.
+  Plus 22 big games that install on their own. For the N0110, N0115 and N0120, in English, French and Chinese.
 </p>
 
 <p align="center">
@@ -130,8 +130,11 @@ These are too big to fit next to NumPlay, so each one is its own app. Install it
     <td align="center"><a href="games/tombofthemask/README.md"><img src="docs/media/thumb_tombofthemask.png" width="200" alt="Tomb of the Mask"><br><b>Tomb of the Mask</b></a><br><sub>Dash through the tomb: the arcade climb and all 200 stages</sub><br><a href="https://github.com/Mason363/NumPlay/releases/latest/download/TombOfTheMask.nwa">Download</a></td>
   </tr>
   <tr>
+    <td align="center"><a href="games/uno/README.md"><img src="docs/media/thumb_uno.png" width="200" alt="UNO"><br><b>UNO</b></a><br><sub>The card game against one to three bots, to 500 points</sub><br><a href="https://github.com/Mason363/NumPlay/releases/latest/download/UNO.nwa">Download</a></td>
     <td align="center"><a href="https://github.com/Mason363/NumWorks-Super-Mario-64"><b>Super Mario 64</b></a><br><sub>In a repository of its own: NumWorks-Super-Mario-64</sub></td>
     <td align="center"><a href="https://github.com/Mason363/NumWorks-Super-Mario-Bros"><b>Super Mario Bros.</b></a><br><sub>All 32 stages, in a repository of its own: NumWorks-Super-Mario-Bros</sub></td>
+  </tr>
+  <tr>
     <td align="center"><a href="#roadmap"><b>More on the way</b></a><br><sub>Minecraft 1.18.2 and more: see the roadmap</sub></td>
   </tr>
 </table>
@@ -274,6 +277,7 @@ Read **[Make your own NumWorks game](docs/make-a-game.md)** to go from there, an
 - [x] Dune
 - [x] Monkey Mart
 - [x] Tomb of the Mask
+- [x] UNO
 - [x] [NumPlay Studio](https://mason363.github.io/NumPlay/customize/), the website where you pick the games in your NumPlay, with Enlarged Extra Apps to fit several big games
 - [ ] Full Minecraft 1.18.2 as a standalone app
 - [ ] Among Us, against bots
@@ -337,6 +341,7 @@ NumPlay is a fan project, made out of love for these games and for the NumWorks
 - **Dune!** by Team Lava inspired NumPlay's Dune, which ports Dune Rider, Inlogic Software's web version: its pictures, Bango Pro lettering and numbers, and its physics, [p2.js](https://github.com/schteppe/p2.js) by Stefan Hedman (MIT License), written again in C. **[Bobydeluxe](https://github.com/Bobydeluxe)** brought it to NumPlay. Not affiliated with Team Lava or Inlogic Software.
 - **Monkey Mart** by TinyDobbins inspired NumPlay's Monkey Mart, which follows the rules, timings and numbers of the game's web version and uses its pictures, its monkeys and animals and the **Riffic** font from it. **[Bobydeluxe](https://github.com/Bobydeluxe)** brought it to NumPlay. Not affiliated with TinyDobbins.
 - **Tomb of the Mask** by Playgendary inspired NumPlay's Tomb of the Mask, which follows the rules of the game's web version and uses its stages, pictures and pixel font. **[Bobydeluxe](https://github.com/Bobydeluxe)** brought it to NumPlay. Not affiliated with Playgendary.
+- **UNO** by Mattel inspired NumPlay's UNO, which plays by the official rules with cards drawn for the calculator. **[Bobydeluxe](https://github.com/Bobydeluxe)** brought it to NumPlay. Not affiliated with Mattel.
 - **[Level Devil](https://store.steampowered.com/app/3242750/)** by Unept: NumPlay's Level Devil is written in C with no code from the game, but its 80 rooms (their tiles, traps and timing) are the game's own, taken from its web build by games/leveldevil/tools/fetch.py, and its runner is drawn from the game's sprites.
 
 - **Pong** by Atari (1972) inspired NumPlay's 2 Players, with air hockey, tanks in a maze in the spirit of Tank Trouble and the light cycles of Tron. All four are written in C for NumPlay and drawn from shapes, with no code or art from them.
@@ -365,7 +370,7 @@ NumPlay is a fan project, made out of love for these games and for the NumWorks
 
 NumPlay is licensed under the [GNU General Public License v3.0](LICENSE). Copyright (c) 2026 Mason Chen. Code and fonts from others keep their own licenses: the `UNLICENSE` files in the games' folders and the [LICENSES](LICENSES) folder. The names, artwork and music of the games NumPlay is inspired by belong to their makers and are not covered by it.
 
-<sub>Unofficial fan games, not affiliated with NumWorks, RobTop Games (Geometry Dash), Hipster Whale (Crossy Road), the makers of Drive Mad, LocalThunk or Playstack (Balatro), Mike Klubnika or Critical Reflex (Buckshot Roulette), Hungry Studio (Block Blast!), Aladdin X (Suika Game), Voodoo (Flappy Dunk), Lima Sky (Doodle Jump), Mojang or Microsoft (Minecraft), Maddy Makes Games (Celeste), Team Cherry (Hollow Knight), Toby Fox (Undertale), id Software (Doom), Edmund McMillen, Florian Himsl or Nicalis (The Binding of Isaac), PopCap Games or Electronic Arts (Plants vs. Zombies), Scott Cawthon (Five Nights at Freddy's), SEGA (Sonic the Hedgehog, Master System, Game Gear), SYBO or Kiloo (Subway Surfers), Fingersoft (Hill Climb Racing), Unept (Level Devil), Halfbrick (Jetpack Joyride), Madbox (Stickman Hook), Nintendo (Donkey Kong, Game Boy, NES), Team Lava (Dune!), Inlogic Software (Dune Rider), TinyDobbins (Monkey Mart), Playgendary (Tomb of the Mask), Atari (Pong), Disney (Tron), Orteil or DashNet (Cookie Clicker), Taito or Midway (Space Invaders), Thinking Rabbit or Falcon (Sokoban), Florian van Strien (The Final Earth 2), The Powder Toy's developers (The Powder Toy), MateoConLechuga (Portal Returns), Valve (Portal), .GEARS (Flappy Bird), Bandai Namco (Pac-Man), Hasbro (Connect Four), Google (Snake, Solitaire, Block Breaker, Chrome Dino, Doodle Champion Island Games), STUDIO4°C or Microsoft (Minesweeper), ducalex (Retro-Go). Tetris is a trademark of The Tetris Company, Chrome of Google LLC, Minecraft of Mojang Synergies AB, Pac-Man of Bandai Namco, Connect Four of Hasbro, DOOM of ZeniMax Media, Sonic the Hedgehog, Master System and Game Gear of SEGA, Space Invaders of Taito, and Donkey Kong, Game Boy, Game Boy Color and NES of Nintendo.</sub>
+<sub>Unofficial fan games, not affiliated with NumWorks, RobTop Games (Geometry Dash), Hipster Whale (Crossy Road), the makers of Drive Mad, LocalThunk or Playstack (Balatro), Mike Klubnika or Critical Reflex (Buckshot Roulette), Hungry Studio (Block Blast!), Aladdin X (Suika Game), Voodoo (Flappy Dunk), Lima Sky (Doodle Jump), Mojang or Microsoft (Minecraft), Maddy Makes Games (Celeste), Team Cherry (Hollow Knight), Toby Fox (Undertale), id Software (Doom), Edmund McMillen, Florian Himsl or Nicalis (The Binding of Isaac), PopCap Games or Electronic Arts (Plants vs. Zombies), Scott Cawthon (Five Nights at Freddy's), SEGA (Sonic the Hedgehog, Master System, Game Gear), SYBO or Kiloo (Subway Surfers), Fingersoft (Hill Climb Racing), Unept (Level Devil), Halfbrick (Jetpack Joyride), Madbox (Stickman Hook), Nintendo (Donkey Kong, Game Boy, NES), Team Lava (Dune!), Inlogic Software (Dune Rider), TinyDobbins (Monkey Mart), Playgendary (Tomb of the Mask), Mattel (UNO), Atari (Pong), Disney (Tron), Orteil or DashNet (Cookie Clicker), Taito or Midway (Space Invaders), Thinking Rabbit or Falcon (Sokoban), Florian van Strien (The Final Earth 2), The Powder Toy's developers (The Powder Toy), MateoConLechuga (Portal Returns), Valve (Portal), .GEARS (Flappy Bird), Bandai Namco (Pac-Man), Hasbro (Connect Four), Google (Snake, Solitaire, Block Breaker, Chrome Dino, Doodle Champion Island Games), STUDIO4°C or Microsoft (Minesweeper), ducalex (Retro-Go). Tetris is a trademark of The Tetris Company, Chrome of Google LLC, Minecraft of Mojang Synergies AB, Pac-Man of Bandai Namco, Connect Four of Hasbro, DOOM of ZeniMax Media, Sonic the Hedgehog, Master System and Game Gear of SEGA, Space Invaders of Taito, UNO of Mattel, and Donkey Kong, Game Boy, Game Boy Color and NES of Nintendo.</sub>
 
 ## Gallery
 
@@ -453,5 +458,6 @@ NumPlay is licensed under the [GNU General Public License v3.0](LICENSE). Copyri
   <tr>
     <td align="center"><img src="docs/media/monkeymart.gif" alt="Monkey Mart: the monkey carries bananas and milk to the shelves while the customers shop"><br><a href="games/monkeymart/README.md"><b>Monkey Mart</b></a></td>
     <td align="center"><img src="docs/media/tombofthemask.gif" alt="Tomb of the Mask: dashing up the tomb ahead of the rising flood"><br><a href="games/tombofthemask/README.md"><b>Tomb of the Mask</b></a></td>
+    <td align="center"><img src="docs/media/uno.gif" alt="UNO: a hand against three bots, a Draw Two and a colour called"><br><a href="games/uno/README.md"><b>UNO</b></a></td>
   </tr>
 </table>
diff --git a/docs/media/thumb_uno.png b/docs/media/thumb_uno.png
diff --git a/docs/media/uno.gif b/docs/media/uno.gif
diff --git a/docs/play.md b/docs/play.md
@@ -565,6 +565,22 @@ Dash up the tomb ahead of the rising flood, picking up dots and coins and dodgin
 
 <br clear="right">
 
+## UNO
+
+<img src="../games/uno/docs/shot.png" width="320" align="right" alt="UNO">
+
+| Key | What it does |
+| --- | --- |
+| **Left, Right** | Pick a card |
+| **OK** | Play it |
+| **Up** | Draw |
+| **shift** | Say UNO, or catch a bot that didn't |
+| **Back** | Pause (with New game, How to play and Quit) |
+
+Match the top card by colour or number, or play a Wild. Skip, Reverse, Draw Two and Wild Draw Four work as in the official rules, and you can challenge a Wild Draw Four. Say UNO when you're down to one card. The first to empty their hand scores the others' cards; the first to 500 wins. Your game is saved.
+
+<br clear="right">
+
 ## Portal Returns
 
 <img src="media/portal.gif" width="320" align="right" alt="Portal Returns: falling through a portal and flying across a test chamber">

diff --git a/games/games.json b/games/games.json
@@ -677,7 +677,7 @@
   },
   {
     "id": "championisland",
-    "rank": 18,
+    "rank": 19,
     "title": "Champion Island",
     "tagline": "Seven sports, one island",
     "credit": "Based on Google's Champion Island Games",
@@ -699,7 +699,7 @@
   },
   {
     "id": "finalearth2",
-    "rank": 19,
+    "rank": 20,
     "title": "The Final Earth 2",
     "tagline": "Build a city in space",
     "credit": "Based on the game by Florian van Strien",
@@ -721,7 +721,7 @@
   },
   {
     "id": "numpowder",
-    "rank": 14,
+    "rank": 15,
     "title": "NumPowder",
     "tagline": "Sand, water, fire and more",
     "credit": "Inspired by The Powder Toy",
@@ -775,7 +775,7 @@
   },
   {
     "id": "fnaf",
-    "rank": 12,
+    "rank": 13,
     "title": "Five Nights at Freddy's",
     "tagline": "Survive five nights",
     "credit": "Based on the game by Scott Cawthon",
@@ -836,7 +836,7 @@
   },
   {
     "id": "isaac",
-    "rank": 16,
+    "rank": 17,
     "title": "The Binding of Isaac",
     "tagline": "Cry through the basement",
     "credit": "Based on the game by Edmund McMillen",
@@ -858,7 +858,7 @@
   },
   {
     "id": "hillclimb",
-    "rank": 17,
+    "rank": 18,
     "title": "Hill Climb Racing",
     "tagline": "Drive up, don't flip",
     "credit": "Based on Hill Climb Racing by Fingersoft",
@@ -902,7 +902,7 @@
   },
   {
     "id": "sonic",
-    "rank": 15,
+    "rank": 16,
     "title": "Sonic the Hedgehog",
     "tagline": "Run through six zones",
     "credit": "Based on the game by Sonic Team",
@@ -923,7 +923,7 @@
   },
   {
     "id": "cookieclicker",
-    "rank": 21,
+    "rank": 22,
     "title": "Cookie Clicker",
     "tagline": "Bake billions of cookies",
     "credit": "Based on Cookie Clicker by Orteil",
@@ -944,7 +944,7 @@
   },
   {
     "id": "leveldevil",
-    "rank": 20,
+    "rank": 21,
     "title": "Level Devil",
     "tagline": "Run to the door",
     "credit": "Based on Level Devil by Unept",
@@ -1007,7 +1007,7 @@
   },
   {
     "id": "donkeykong",
-    "rank": 13,
+    "rank": 14,
     "title": "Donkey Kong",
     "tagline": "Climb the girders and save Pauline",
     "credit": "Based on Donkey Kong by Nintendo",
@@ -1088,5 +1088,26 @@
     "repo": "https://github.com/Mason363/NumPlay/tree/main/games/tombofthemask",
     "default": false,
     "xl": true
+  },
+  {
+    "id": "uno",
+    "rank": 12,
+    "title": "UNO",
+    "tagline": "Match the cards, shout UNO",
+    "credit": "Based on UNO by Mattel",
+    "top": "0x1F6B4A",
+    "bottom": "0x0B3324",
+    "accent": "0xE53935",
+    "colors": 16,
+    "records": [
+      "uno.sav",
+      "uno_saves.py"
+    ],
+    "shots": [
+      "docs/shot.png"
+    ],
+    "repo": "https://github.com/Mason363/NumPlay/tree/main/games/uno",
+    "default": false,
+    "xl": true
   }
 ]
diff --git a/games/uno/.gitignore b/games/uno/.gitignore
@@ -0,0 +1,2 @@
+output/
+build/
diff --git a/games/uno/Makefile b/games/uno/Makefile
@@ -0,0 +1,56 @@
+# UNO on the NumWorks calculator.
+#   make            output/uno.nwa
+#   make check      link it like the calculator does (output/uno.bin)
+#   make host       build/play: the game on a computer, for tests and pictures
+#   make test       the rules against the instruction sheet, bots playing whole games to 500, random keys, saves
+#                   (with the sanitizers)
+Q ?= @
+CC = arm-none-eabi-gcc
+NWLINK ?= npx --yes -- nwlink@1.0.0
+BUILD_DIR = output
+L = ../../launcher/src
+
+SRC = src/main.c src/game.c src/bot.c src/draw.c src/save.c src/plat_eadk.c $(L)/gfx.c $(L)/font_data.c $(L)/xfont.c
+HEADERS = $(wildcard src/*.h) $(L)/gfx.h $(L)/font.h $(L)/np.h ../common/epsilon_app.h ../common/epsilon_files.h
+
+CFLAGS = -std=gnu11 $(shell $(NWLINK) eadk-cflags-device) -DPLATFORM_DEVICE=1 -DEPSILON_XL=1 -I$(L)
+CFLAGS += -Os -Wall -Wextra -Wno-unused-parameter -fno-math-errno -fsingle-precision-constant
+CFLAGS += -fno-tree-loop-distribute-patterns -flto -fno-fat-lto-objects -fwhole-program -fvisibility=internal
+CFLAGS += -ffunction-sections -fdata-sections
+LDFLAGS = -Wl,--relocatable -nostartfiles --specs=nano.specs
+LDFLAGS += -Wl,-e,main -Wl,-u,eadk_app_name -Wl,-u,eadk_app_icon -Wl,-u,eadk_api_level
+LDFLAGS += -Wl,--gc-sections -flinker-output=nolto-rel
+
+.PHONY: build check clean host test
+build: $(BUILD_DIR)/uno.nwa
+
+# apps get 133652 bytes of RAM on custom builds of Epsilon 25.2 (148928 or more on official ones)
+check: $(BUILD_DIR)/uno.nwa
+	$(Q) $(NWLINK) nwa-bin --ram-length 133652 $< $(BUILD_DIR)/uno.bin
+	@echo "BIN     $(BUILD_DIR)/uno.bin: $$(wc -c < $(BUILD_DIR)/uno.bin) bytes"
+
+$(BUILD_DIR)/uno.nwa: $(SRC) $(HEADERS) $(BUILD_DIR)/icon.o
+	@echo "LD      $@"
+	$(Q) $(CC) $(CFLAGS) $(LDFLAGS) $(SRC) $(BUILD_DIR)/icon.o -lm -o $@
+	$(Q) arm-none-eabi-strip --strip-unneeded $@
+
+$(BUILD_DIR)/icon.o: src/icon.png | $(BUILD_DIR)
+	@echo "ICON    $<"
+	$(Q) $(NWLINK) png-icon-o $< $@
+
+$(BUILD_DIR):
+	$(Q) mkdir -p $@
+
+# on a computer: tests/play.c checks the rules, plays whole games with the bots and random keys, and saves pictures
+HOST_SRC = tests/play.c src/game.c src/bot.c src/draw.c src/save.c $(L)/gfx.c $(L)/font_data.c $(L)/xfont.c
+HOST_FLAGS = -std=gnu11 -O2 -g -Wall -Wextra -Wno-unused-parameter -ffp-contract=off -Isrc -I$(L) -DHOST
+host: build/play
+build/play: $(HOST_SRC) src/main.c $(wildcard src/*.h)
+	$(Q) mkdir -p build
+	$(Q) cc $(HOST_FLAGS) -fsanitize=address,undefined -fno-sanitize-recover=undefined $(HOST_SRC) -lm -o $@
+	@echo "HOST    $@"
+test: build/play
+	build/play test build
+
+clean:
+	$(Q) rm -rf $(BUILD_DIR) build