Hello! Today's update is a small one. Just focused on 4K monitors and controller test.

General:
- Now UnMetal allows resolutions up to 3840x2160 on full screen and windowed.
- Added new test for controllers (type "test controller" on ENTER CODE)
- Controller issues going N,S,E,W are now fixed (thanks David FRÉTÉ for the help!)

Grenade Guy:
- Now you can see his grenades coming in 4K!