Build 0.1.2

Changes in this build:

-Purchasable doors, level to be expanded beyond these doors in future

-Guns updated to be hit scan instead of projectile object collision

-Variety of changes to code to improve performance

First room highest round is 9, overall highest round is 12. Both games ended in player death. Testing of this build has yet to result in a crash. Please report if you surpass round 12 or experience a crash.