Alpha v0.5 released

The new update brings a lot of bugfixes (courtesy of hietakissa and others) and new content.

Bug fixes:

• Removing two of the same items from the cart no longer increases the amount of objectives
• Probably fixed bug with mouse dissapearing on ALT+TAB
• Items no longer fall through the floor or ceiling(probably)
• Fixed some items that you couldn't pick up
• Fixed the problem of there being less donuts than needed to put in the cart

Updates:

• Significantly optimized physics and framerate, should look buttery smooth on 144hz displays.
• Added quick restart button in pause menu
• Added furniture section
• Added more books KNOWLEDGE
• Added new advertisement poster
• Updated credits