changes from jam version

A few things have been added:

• 5 new big flowers, cute mushrooms
• lots of programmer art has been replaced with fancier pixels
• you can move on the grass and start multiple roots
• chest actually does something now
• another item to help you out
• progress tracking
• dynamic lighting at substratum layer
• you can now unlock a view of the whole map for sweet screenshots (thanks Auroriax)