Snowbotron - Ludum Dare 31

Snowbotron is a simple robotron-like. WASD to move, Arrows to shoot. 

Collect all the presents, destroy a bunch of snow mutants who want the presents, screen shake it hard enough to shake the globe and go to the next level. 

Tips: 
If an enemy has a gift when it is destroyed there is a chance the gift will remain for the next level, meaning you won't need all of the freshly spawned ones. 

Fresh powerups won't spawn while you are under the influence of one. If you are overwhelmed, chill and mosh with the crawlers until many powerups have spawned, they can't hurt you if you have no presents.