Builds updated to v 0.2.0

This build update features:
Tweaked lighting.
Fixed bug with options button in game.
Fixed bug in endless mode where enemies would not spawn at high levels.
Tweaked max level in endless mode level 1.
Added level selector when new game is clicked and more levels have been unlocked.
Added level selector for endless mode (only one level is available in beta).
Tweaked tesla, laser and electric shock graphics.
Added low spec, medium spec and high spec settings on the launcher to allow the game to run better on low spec machines.
Tweaks to sounds.
Mines are animated.
Fixed bug that would appear in low FPS (20 FPS and lower), where enemies would not target turrets properly.
Fixed bug that would appear in low FPS (20 FPS and lower), where turrets would not target enemies properly.
Texture compression implemented.

Outside the beta build:
All levels are finished!
Sound work will begin next week!