创建一个基于物理的街机游戏，类似于 Bricks Breaker 或 Ballz!。该游戏（英文）主要集中于发射小球撞击并打碎带数字的方块。

核心机制：
- 玩家瞄准并发射会弹跳的小球，与墙壁和方块碰撞。
- 每个方块根据上面的数字需要被击中一定次数才能破坏。
- 每回合后，所有方块下移一行。
- 若方块到达底部，游戏结束。

射击系统：
- 玩家点击并拖动以瞄准，期间显示弹道预览。
- 松手后，小球按顺序发射，形成拖尾效果。
- 小球完成轨迹后返回，重置炮塔位置。
- 发射距离等同于球的直径；当球数不超过20时，半径为2px，多球时为1px。
- 小球颜色各不相同。

方块行为：
- 方块尺寸为14x14px，上面的数字表示耐久度。
- 第一关的数字为1到5，后续关卡逐渐增多，最高不超过200。
- 方块排列非常密集。

进程与难度：
- 第一关开始只有一颗球，从第二关起重置为五颗球。
- 得分增加可赢得额外球，总数上限为200。

用户界面：
- 底部中央有召回按钮，可召回所有球以便重新发射。
- 分数显示在左下角。

设计要求：
- 方块移动平滑。
- 击中反馈包括声音和分数更新。
- 主题采用黑色背景和对比色。

Create game:
A physics-based arcade game similar to Bricks Breaker, Ballz, or Bounzy! The core mechanics involve launching balls that bounce off walls and hit numbered blocks, reducing their durability until they break.

Core Mechanics
- The player aims and shoots balls in a chosen direction.
- Balls bounce off walls and blocks, continuing until they exit the screen.
- Blocks have a number indicating how many hits they need to break.
- Blocks move down by one row after each turn.
- The game ends when a block reaches the bottom.

Shooting System
- The player taps and drags to aim.
- A full trajectory preview is drawn while aiming.
- When released, all available balls launch in that direction, one after another, forming a trailing effect.
- Balls return to the shooting position after completing their path.
- The cannon's position changes to the first ball that lands.
- The distance between balls during launch equals their diameter.
- Ball radius:
  - **2px** if there are **20 or fewer balls**.
  - **1px** if there are **more than 20 balls**.
- Balls come in different colors.

Block Behavior
- **Size:** Each block is **14x14px**.
- **Numbers:** Blocks start with numbers **1-5** on Level 1, doubling in each subsequent level but capped at **200**.
- **Arrangement:** Blocks are tightly packed, ensuring that balls cannot pass between them.

Progression & Difficulty
- On Level 1, the player starts with one ball.
- Starting from Level 2, the ball count resets to **5**, and players must earn additional balls.
- Players earn **+1 ball per point**, but the maximum ball count is **200**.

User Interface
- **Recall Button:**
  - Placed at the **bottom center** as both an **emoji and button**.
  - Clicking it instantly recalls all balls, allowing for immediate re-shooting.
- **Score Display:**
  - Located at the **bottom left**.

This version includes only the essential mechanics without additional power-ups, leaderboards, or monetization.

Q: How should the blocks' motion mechanics be visually represented?
A: Smooth motion

Q: What kind of feedback should be provided when balls hit blocks?
A: Hit sound, score update

Q: Are there specific themes or styles for the visual design?
A: Black background, contrast colors