Changes:

- Added an Alien Enemy.

- Added an invincibility frame for every time the player respawns (animation where the player appears and disappears intermittently). During this invincibility frame, the player will not suffer any damage from any hazards.

- The player is no longer able to shoot temporarily while dead.

- The rotation freeze bug should be solved.

Known problems:

- The player doesn't have an invincibility frame/period to prevent it from getting spawn killed by another asteroid.

- If an asteroid passes close after the player's death, the player might lose 2 health points instead of 1.

- The player has a short period of time where it is possible to shoot after dying, before respawning.

- Frequent bug of the player having its rotation frozen.

Plans for future updates:

- Add a UI to the game.

- Add a way to start the game again after Game Over, without the need to Alt+F4.

- Add sound fx.