Complete the following tasks to unlock Apple Game Center achievements.
| Achievement | How to unlock
|
|---|
| 100 Enemies | Shoot 100 enemies.
|
| 1000 Enemies | Shoot 1000 enemies.
|
| 20 Enemies | Shoot 20 enemies.
|
| 50 Enemies | Shoot 50 enemies.
|
| Bronze Chalk | Score 25,000 points.
|
| Extra Life | Find the hidden extra life.
|
| Gold Chalk | Score 100,000 points.
|
| Platinum Chalk | Score 1,000,000 points.
|
| Silver Chalk | Score 50,000 points.
|
| Warmup | Score 10,000 points.
|
