I loved the jumping in this game, it feels good, as well as the crawling. I also appreciate that you can rotate with the joystick.
My unique problem (which is completely a 'me' thing) is that I don't have too much space around me, so I didn't finish it due to fear of hitting the wall (got close a couple of times :D). Also, I just got the quest 2 yesterday, so I may not be particularly adept at it yet.
I think you have something in your hands, that you could easily expand in many ways. I hope you keep at it :D!