Instructions
The health of your bubble is its size. If you collide with any object (except a powerup),
your bubble loses health & if your bubble is at 1 health you pop (game over).
If you're in shield mode, you're protected against all enemies and you have a boost ability (by tapping space while moving).
Shield mode lasts about 6 seconds (this time limit resets each time you pick up a shield).
If your score gets high enough you'll face the boss and if you defeat the boss you win!
Powerups: