(Medium Bug) Player has no options when selected exhibit is larger than any free space. See attached video.

[gordykeene]

This is probably a stretch feature, but we should give the player an in-game option to recover.

Perhaps:

1. Only offer 2x2 exhibits when there are no 3x3 spaces (but this wouldn't cover the case where there are no open 2x2 spaces).
2. Give the player the opportunity to go back and choose a smaller exhibit (again, doesn't cover the case where there are no open 2x2 spaces).
3. Give the player the ability to move existing exhibits.
4. Always have a menu item to restart the game.

I know, it's probably going to be 4.