Added GUI icons for XY, XZ, and YZ rotation modes
Updated some materials
Created a model for Level 1

- Includes three meshes
Updated the main character's metadata
Exclude some Blender model backups
Player now dies when touching a wall
Default rotation mode changed to XZ
Update some settings
Create some prefabs
Create a model for the level exit

- I needed the cylinder to be visible from the inside
Add some materials and meta files
Exclude *.blend[123].meta
Update level01