Some feedback on the game:
1) from what I was able to test, the physics are indeed nice.
2) I couldn't pick up anything or fire any guns. I think this might be due to my screen size as opposed to any game related bugs, so an adjustable screen size would be nice I suppose
3) wall jumping is apparently a thing. You can spam jump against the walls and essentially wallrun/climb over them and get out of the intended playable area