Controls are flawless but the choices for buttons are very awkward which makes it not that fun to play. I would say it would get a lot better if the buttons were are next to each other instead of being this odd combo of Shift + E + Space. I get that those buttons are in the perfect position for hand (when you place your hand on the keyboard, the pinkie is naturally over shift, the middle finger over E and thumb over space), but managing those fingers in a platformer is very awkward.
I think this might be because the developers play a lot of WASD+Mouse games. Being used to those games must help, but for me it's not intuitive at all. Z+X+C would've been better for me.
I can see the basic idea and how the game works looking past that issue though. I'd just like the game for me to be hard because of the levels and not because of me trying to figure out what button does what and which finger was it again that made it happen, like a little child learning to play for the first time, lol :D