Update 5 - 0.12

For Mac users this update will be up tomorrow!

Large optimizations to Sandbox mode, and editing large creations New Sandbox Level: Galactic park, and Sandbox level selection screen New Sandbox parts: Side Propeller, Wrecking ball, Bouncer, Artillery Cannon, Battle Axe, External batteries/fuel/ammo, Crusher, Phaser Weapon, Grenade Launcher, and more than ten new cosmetic parts and plates

Fixed error with more than 2 creations saved in Sandbox Changes to inventory screen in Sandbox