diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..a5815d5
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,14 @@
+plugins {
+    id 'java'
+}
+
+group 'rahnzo.kata.solid'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
diff --git a/src/main/java/game/domain/core/DynamoDB.java b/src/main/java/game/domain/core/DynamoDB.java
new file mode 100644
index 0000000..aa4b743
--- /dev/null
+++ b/src/main/java/game/domain/core/DynamoDB.java
@@ -0,0 +1,21 @@
+package game.domain.core;
+
+import game.domain.player.PlayerRecord;
+import game.domain.player.PlayerInfo;
+
+import java.util.Set;
+
+public class DynamoDB {
+    public Set<PlayerInfo> getUserInfo(long userId) {
+        // Get a db connection and query
+        return Set.of(new PlayerInfo("current-level", "level_1"));
+    }
+
+    public void saveOrUpdate(PlayerRecord playerRecord) {
+        // Save or update player to db
+    }
+
+    public void delete(long userId) {
+        // Delete player from db
+    }
+}
diff --git a/src/main/java/game/domain/core/GameCore.java b/src/main/java/game/domain/core/GameCore.java
new file mode 100644
index 0000000..cdceb3a
--- /dev/null
+++ b/src/main/java/game/domain/core/GameCore.java
@@ -0,0 +1,19 @@
+package game.domain.core;
+
+import game.domain.input.UserAction;
+
+public class GameCore {
+
+    public void initializeAllGameObjects() {
+        // Load all objects
+        // Init game parameters with complex and large operations
+    }
+
+    public void processInput(UserAction userAction) {
+        // Apply logic on event, calling hero actions
+    }
+
+    public void handleHardwareEvents(Object hardwareEvent) {
+        // Apply certain actions based on hardware events
+    }
+}
diff --git a/src/main/java/game/domain/core/GameEventObserver.java b/src/main/java/game/domain/core/GameEventObserver.java
new file mode 100644
index 0000000..4c8b545
--- /dev/null
+++ b/src/main/java/game/domain/core/GameEventObserver.java
@@ -0,0 +1,32 @@
+package game.domain.core;
+
+import game.domain.hero.HeroInteract;
+
+public class GameEventObserver {
+
+    private final World world;
+    private final HeroInteract heroInteract;
+
+    // This works by injection
+    public GameEventObserver(World world, HeroInteract heroInteract) {
+        this.world = world;
+        this.heroInteract = heroInteract;
+    }
+
+    public void observeHeroPunch(Object obj) {
+        // Do some task with punch event
+        world.processEvent(obj);
+        heroInteract.processEvent(obj);
+    }
+
+    public void observeHeroMagicCasting(Object obj) {
+        // Do some task with magic casting
+        world.processEvent(obj);
+        heroInteract.processEvent(obj);
+    }
+
+    public void observeHeroJump(Object obj) {
+        // Do some task with jump event
+        world.processEvent(obj);
+    }
+}
diff --git a/src/main/java/game/domain/core/World.java b/src/main/java/game/domain/core/World.java
new file mode 100644
index 0000000..27f2efa
--- /dev/null
+++ b/src/main/java/game/domain/core/World.java
@@ -0,0 +1,16 @@
+package game.domain.core;
+
+import game.domain.music.SpotifyPlugin;
+
+public class World {
+
+    private final SpotifyPlugin spotifyPlugin = new SpotifyPlugin();
+
+    public void runWorld() {
+        spotifyPlugin.playMusic();
+    }
+
+    public void processEvent(Object obj) {
+        // Process a world event
+    }
+}
diff --git a/src/main/java/game/domain/hero/Hero.java b/src/main/java/game/domain/hero/Hero.java
new file mode 100644
index 0000000..4845cf5
--- /dev/null
+++ b/src/main/java/game/domain/hero/Hero.java
@@ -0,0 +1,6 @@
+package game.domain.hero;
+
+public interface Hero {
+    void punch();
+    void jump();
+}
diff --git a/src/main/java/game/domain/hero/HeroInteract.java b/src/main/java/game/domain/hero/HeroInteract.java
new file mode 100644
index 0000000..ad5a107
--- /dev/null
+++ b/src/main/java/game/domain/hero/HeroInteract.java
@@ -0,0 +1,16 @@
+package game.domain.hero;
+
+import java.util.Set;
+
+public class HeroInteract {
+
+    private final Set<Hero> heroes;
+
+    public HeroInteract(Set<Hero> heroes) {
+        this.heroes = heroes;
+    }
+
+    public void processEvent(Object obj) {
+        // Process a event between heroes
+    }
+}
diff --git a/src/main/java/game/domain/hero/MagicianHero.java b/src/main/java/game/domain/hero/MagicianHero.java
new file mode 100644
index 0000000..ef781b8
--- /dev/null
+++ b/src/main/java/game/domain/hero/MagicianHero.java
@@ -0,0 +1,14 @@
+package game.domain.hero;
+
+public class MagicianHero extends MeleeHero {
+
+    public void castMagic() {
+        gameEventObserver.observeHeroMagicCasting(this);
+        // Do some casting action
+    }
+
+    @Override
+    public void punch() {
+        // This hero is a magician. Does not punch.
+    }
+}
diff --git a/src/main/java/game/domain/hero/MeleeHero.java b/src/main/java/game/domain/hero/MeleeHero.java
new file mode 100644
index 0000000..ab8bea1
--- /dev/null
+++ b/src/main/java/game/domain/hero/MeleeHero.java
@@ -0,0 +1,22 @@
+package game.domain.hero;
+
+import game.domain.core.GameEventObserver;
+
+public class MeleeHero implements Hero {
+    private int punchPower;
+    protected GameEventObserver gameEventObserver;
+
+    @Override
+    public void punch() {
+        gameEventObserver.observeHeroPunch(this);
+        // process hero actions for hero
+    }
+
+    @Override
+    public void jump() {
+        gameEventObserver.observeHeroJump(this);
+        // process jump action for hero
+    }
+
+    //TODO: Next week this class will change in order to support a new turbo punch feature
+}
diff --git a/src/main/java/game/domain/input/ButtonAction.java b/src/main/java/game/domain/input/ButtonAction.java
new file mode 100644
index 0000000..7e4324f
--- /dev/null
+++ b/src/main/java/game/domain/input/ButtonAction.java
@@ -0,0 +1,6 @@
+package game.domain.input;
+
+public enum ButtonAction {
+    JUMP,
+    PUNCH
+}
diff --git a/src/main/java/game/domain/input/GamepadInput.java b/src/main/java/game/domain/input/GamepadInput.java
new file mode 100644
index 0000000..37eab77
--- /dev/null
+++ b/src/main/java/game/domain/input/GamepadInput.java
@@ -0,0 +1,32 @@
+package game.domain.input;
+
+import game.domain.core.GameCore;
+
+public class GamepadInput implements PlayerInput {
+
+    public final GameCore gameCore;
+
+    public GamepadInput(GameCore gameCore) {
+        this.gameCore = gameCore;
+    }
+
+    @Override
+    public void captureKeyPressed(KeyAction keyAction) {
+        // Log warning, this is not supported
+    }
+
+    @Override
+    public void captureBottomPressed(ButtonAction keyAction) {
+        gameCore.processInput(convertTo(keyAction));
+    }
+
+    @Override
+    public void captureStickPressed(ButtonAction keyAction) {
+        gameCore.processInput(convertTo(keyAction));
+    }
+
+    private UserAction convertTo(ButtonAction keyAction) {
+        // Map to user action
+        return UserAction.GENERIC;
+    }
+}
diff --git a/src/main/java/game/domain/input/KeyAction.java b/src/main/java/game/domain/input/KeyAction.java
new file mode 100644
index 0000000..6f00c3e
--- /dev/null
+++ b/src/main/java/game/domain/input/KeyAction.java
@@ -0,0 +1,10 @@
+package game.domain.input;
+
+public enum KeyAction {
+    UP,
+    DOWN,
+    LEFT,
+    RIGHT,
+    Z,
+    X
+}
diff --git a/src/main/java/game/domain/input/KeyboardInput.java b/src/main/java/game/domain/input/KeyboardInput.java
new file mode 100644
index 0000000..7bb87eb
--- /dev/null
+++ b/src/main/java/game/domain/input/KeyboardInput.java
@@ -0,0 +1,32 @@
+package game.domain.input;
+
+import game.domain.core.GameCore;
+
+public class KeyboardInput implements PlayerInput {
+
+    public final GameCore gameCore;
+
+    public KeyboardInput(GameCore gameCore) {
+        this.gameCore = gameCore;
+    }
+
+    @Override
+    public void captureKeyPressed(KeyAction keyAction) {
+        gameCore.processInput(convertTo(keyAction));
+    }
+
+    @Override
+    public void captureBottomPressed(ButtonAction keyAction) {
+        // Log warning, this is not supported
+    }
+
+    @Override
+    public void captureStickPressed(ButtonAction keyAction) {
+        // Log warning, this is not supported
+    }
+
+    private UserAction convertTo(KeyAction keyAction) {
+        // Map to user action
+        return UserAction.GENERIC;
+    }
+}
diff --git a/src/main/java/game/domain/input/PlayerInput.java b/src/main/java/game/domain/input/PlayerInput.java
new file mode 100644
index 0000000..3299931
--- /dev/null
+++ b/src/main/java/game/domain/input/PlayerInput.java
@@ -0,0 +1,7 @@
+package game.domain.input;
+
+public interface PlayerInput {
+    void captureKeyPressed(KeyAction keyAction);
+    void captureBottomPressed(ButtonAction keyAction);
+    void captureStickPressed(ButtonAction keyAction);
+}
diff --git a/src/main/java/game/domain/input/StickAction.java b/src/main/java/game/domain/input/StickAction.java
new file mode 100644
index 0000000..e86c310
--- /dev/null
+++ b/src/main/java/game/domain/input/StickAction.java
@@ -0,0 +1,8 @@
+package game.domain.input;
+
+public enum StickAction {
+    UP,
+    DOWN,
+    LEFT,
+    RIGHT,
+}
diff --git a/src/main/java/game/domain/input/UserAction.java b/src/main/java/game/domain/input/UserAction.java
new file mode 100644
index 0000000..656995f
--- /dev/null
+++ b/src/main/java/game/domain/input/UserAction.java
@@ -0,0 +1,11 @@
+package game.domain.input;
+
+public enum UserAction {
+    DIRECTION_UP,
+    DIRECTION_DOWN,
+    DIRECTION_LEFT,
+    DIRECTION_RIGHT,
+    PUNCH_PRESSED,
+    JUMP_PRESSED,
+    GENERIC
+}
diff --git a/src/main/java/game/domain/music/SpotifyPlugin.java b/src/main/java/game/domain/music/SpotifyPlugin.java
new file mode 100644
index 0000000..b286f17
--- /dev/null
+++ b/src/main/java/game/domain/music/SpotifyPlugin.java
@@ -0,0 +1,7 @@
+package game.domain.music;
+
+public class SpotifyPlugin {
+    public void playMusic() {
+        // Do some management of the plugin and play music
+    }
+}
diff --git a/src/main/java/game/domain/player/Player.java b/src/main/java/game/domain/player/Player.java
new file mode 100644
index 0000000..4532fbe
--- /dev/null
+++ b/src/main/java/game/domain/player/Player.java
@@ -0,0 +1,25 @@
+package game.domain.player;
+
+import game.domain.core.DynamoDB;
+
+import java.util.Map;
+import java.util.Set;
+
+public class Player {
+
+    private static final DynamoDB DYNAMO_DB = new DynamoDB();
+
+    public void createPlayer(String name, Map<String, String> attributes) {
+        // Do some parsing work
+        DYNAMO_DB.saveOrUpdate(new PlayerRecord());
+    }
+
+    public Process getProcess(long userId) {
+        return calculateProcess(DYNAMO_DB.getUserInfo(userId));
+    }
+
+    private Process calculateProcess(Set<PlayerInfo> playerInfo) {
+        // Do some expensive computations in order to calculate process
+        return new Process("level_1", 10, 30, 3);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/game/domain/player/PlayerInfo.java b/src/main/java/game/domain/player/PlayerInfo.java
new file mode 100644
index 0000000..b702071
--- /dev/null
+++ b/src/main/java/game/domain/player/PlayerInfo.java
@@ -0,0 +1,19 @@
+package game.domain.player;
+
+public class PlayerInfo {
+    public String key;
+    public String value;
+
+    public PlayerInfo(String key, String value) {
+        this.key = key;
+        this.value = value;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+}
diff --git a/src/main/java/game/domain/player/PlayerRecord.java b/src/main/java/game/domain/player/PlayerRecord.java
new file mode 100644
index 0000000..78de3c7
--- /dev/null
+++ b/src/main/java/game/domain/player/PlayerRecord.java
@@ -0,0 +1,4 @@
+package game.domain.player;
+
+public class PlayerRecord {
+}
diff --git a/src/main/java/game/domain/player/Process.java b/src/main/java/game/domain/player/Process.java
new file mode 100644
index 0000000..4911f86
--- /dev/null
+++ b/src/main/java/game/domain/player/Process.java
@@ -0,0 +1,49 @@
+package game.domain.player;
+
+public class Process {
+    private String stage;
+    private int level;
+    private int currentPunchPower;
+    private int powerLevelMultiplier;
+
+    // A lot of process indicators
+
+    public Process(String stage, int level, int currentPunchPower, int powerLevelMultiplier) {
+        this.stage = stage;
+        this.level = level;
+        this.currentPunchPower = currentPunchPower;
+        this.powerLevelMultiplier = powerLevelMultiplier;
+    }
+
+    public String getStage() {
+        return stage;
+    }
+
+    public void setStage(String stage) {
+        this.stage = stage;
+    }
+
+    public int getLevel() {
+        return level;
+    }
+
+    public void setLevel(int level) {
+        this.level = level;
+    }
+
+    public int getCurrentPunchPower() {
+        return currentPunchPower;
+    }
+
+    public void setCurrentPunchPower(int currentPunchPower) {
+        this.currentPunchPower = currentPunchPower;
+    }
+
+    public int getPowerLevelMultiplier() {
+        return powerLevelMultiplier;
+    }
+
+    public void setPowerLevelMultiplier(int powerLevelMultiplier) {
+        this.powerLevelMultiplier = powerLevelMultiplier;
+    }
+}