[DF] Sorta isometric

Had the chance to work on the projection to and from the level space. It's consistent now, but I decided to go with spheres for everything to speed up the process. This means that mouse interactions with the surface are going to be iffy, so I'll have to space out entities a bit. That shouldn't be so bad.

Only the menu is up, now to write a runner and a generating level. I'm going to save interactions for later tonight.

current build