Collect all trophies in game.
Kill an enemy in level.
Destroy an obstacle in level.
Collect shield power up.
Collect multi shot power up.
Collect power shot power up.
Kill 2 enemies in level.
Destroy 2 obstacles in level.
Kill enemies halfway through the level.
Kill 3 enemies in level.
Destroy 3 obstacles in level.
Complete a level by killing all enemies.
