Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Bouncy castle	Complete every bouncy balls level	50
Dragon Bro	Complete every level at the maximum difficulty	200
Hold the line	Defeat 10 enemies in a row while locked in position	75
Over 9000!	Defeat over 9000 enemies	100
Space Guardian	Complete every space invasion level	50
Speed run	Complete level 1 in less than 2:20	100
The Reaper	Defeat 1000 enemies	75