Merge pull request #1 from sunflowerbutter/master

I replaced stairs with a hill on the left.
Rotate the eye based on touch events.

Commented out vertical eye rotation, it bobs up and down a lot otherwise.
Merge change: Replaced stairs with a hill on the left.
Fixed the comment: stairs -> hill.
Fix eye rotation bugs, enable vertical eye rotation.

Also, revert the horizontal rotation direction, speed up rotation a bit to feel more natural.
I fixed a bug, made blocks even on the right side.