Level 0 and balancing

-Completely overhauled the graphics for Level 0
-Fixed a glitch where you could look through walls if you stood close enough to them
-Balanced Bacteria to stop from detecting players further out than necessary
-Fixed a bug where if you encountered an entity and it your sanity went down, you would go negative on sanity.
-Fixed a bug where when falling to the town from level 0 you could get stuck halfway down