This is a great game, but there are a few bugs.
1. When running in full-screen at 1920*1080, some of the buttons are hidden. (Maybe a smaller UI in proportion to the resolution.)
2. When running at a lower resolution than 1080p, everything is dark, except when I'm in windowed mode.
3. Problem with windowed mode, though, is that there is no cursor lock, so every time I turn, it (the cursor) goes out of the window.
I wonder if you should get rid of the level cap though. It does balance a few things.