Revamped the treasure chests. Now each one offers different things.

Added a small window of invincibility, so spikes don't instantly kill you.

Berries from bushes can now be eaten. They give a small sanity boost (this will be handy later, hopefully).

The code for the enemies and ghosts is there, but still being written. Almost there. I had to borrow a bit of code from my other projects. namely how objects work. It's still pretty messy.