Linux Build, Optimization and Bug Fixes

Hello everyone,

a small update of the game is available. Here are the changes:

• added download version for linux
• fixed a bug, where the player was able to attack in every level
• the blocks around the starting position of the player only appear when a level starts
• some performance optimizations
• added post processing effects (anti-aliasing and vignette) for windows and linux

Every feedback is highly appreciated! Thanks for playing :)