I really enjoyed playing- it looks fantastic and controls really well, so great work!
A few things that could do with improving:
First time round, I fell off the map and kept falling. It would be good to have the escape button as a way to return to the menu.
My controller didn't work (it's a Logitech which counts as an Xbox controller),
Would be good if I could reduce the graphics settings (apologies if you can and I just missed this).
If the game is played on keys or controller, I think you should be able to navigate the menu this way too (and if you release the game on Steam, this is something they're quite strict about).
This is obviously a very ambitious game, so I definitely appreciate all effort, but maybe needs some polish and playtesting :)