bugfixes and 'you're dead' screen

- In the second map, you could fall through the floor fairly easily when loading the level. The voxel world was loading slower than the player was, so there was nothing to land on! This should make that happen less frequently.  The experience previous to this patch was: imagine loading level 2 and occasionally just falling into a white void, and having to reload.

- A playtester insisted that there be a 'you are dead' screen. Now there is!

- VR support theoretically removed in hopes of messing with people's headsets less while they try to play

Note: these changes were made after the jam deadline, so just pretend the bugs still exist