UniteBattleRun

Unite Battle Run is a 3D parkour + auto-battle hybrid casual game. Players control a character running along a platform track, recruiting neutral allies while avoiding obstacles. Upon reaching the finish line, the game transitions into an auto-battle phase against enemy AI until one side is completely eliminated.

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### Core Gameplay

The game consists of two phases:

#### Phase 1: Running Phase
- Players control a character running forward on a **3D platform track**.
- The track is populated with **obstacle groups** containing spinning blades, moving hazards, and more.
- **Neutral characters** (yellow-green) are scattered along the track — touching them **recruits** them to your team (turning them purple).
- Touching an obstacle (tagged as `Obstacle`) causes **instant death** of the character.
- Reaching the **destination** at the end of the track triggers the battle phase.

#### Phase 2: Battle Phase
- The game switches to **auto-battle mode** upon reaching the destination.
- **Enemy AI characters** (blue-purple) are pre-placed at the end of the track.
- Each ally automatically locks onto an opponent, approaches them, and plays **attack animations** (7 types of attack actions).
- Each character has a random **death countdown** (1–5 seconds); the character dies when the countdown ends.
- During battle, players can **tap the screen** to trigger attacks from allied characters, speeding up the fight.

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### Controls

| Action | Running Phase | Battle Phase |
|--------|--------------|-------------|
| **Tap / Touch Screen** | Start running | Trigger ally attacks |
| **Swipe Left / Right** | Steer the character (-45°~45° range) | — |
| **Release Touch** | Character stops and returns to idle | — |

*Note: Keys Q / C / S are debug shortcuts (instant win / clear level / next level).*

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### Win / Lose Conditions

| Condition | Description |
|-----------|-------------|
| **Victory** | All enemy characters are eliminated, and at least one ally survives |
| **Defeat** | All allied characters are eliminated |

The system checks the survival status of both sides every 1 second.

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### Levels & Difficulty

- The game starts at **Level 1** and automatically progresses after each victory.
- Difficulty increases with level in three ways:
- **Obstacle group probability weights** shift: higher levels feature harder obstacle combinations.
- **Enemy count** increases: from 2–5 enemies to 5–10 enemies.
- **Platform spacing** decreases: obstacles become denser (20 → 15 → 12 units).

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### Recruitment System

- Neutral characters (yellow-green) scattered on the track can be recruited.
- When the player touches a neutral character, it joins the player's faction (turning purple).
- Recruited characters participate in the battle phase, increasing the player's combat strength.