Bug fixes and technical polish

This update adds a lot of the visual polish that was intended with the jam release and also includes a couple fixes for bugs and technical issues that someone who shall remain nameless (I'm looking at you, Travis) complained quite a bit about.

BUG FIXES: 
   -The player no longer gets a game over after sitting on the win screen for too long. 
        [This was caused by the background processes like fuel continuing even in the game over state]
   -Small, unnoteworthy bug fixes

VISUAL POLISH:
The following actions now have animations:
    -Climbing a ladder
    -Placing coal in the furnace

MISC. CHANGES:
    -Cursor no longer shows up in the game window
    -Key presses have their default behavior removed.
        [People who understandably thought that pressing down would make you go down ladders no longer scroll the page (Travis)]
    -The game as a whole was made easier