It's a neat game but there are some issues with movement and controls. I kept getting stuck on walls while falling or boosting into the air when trying to jump as I moved towards the edge of a wall.
It felt like I couldn't hit enemies very easily. I'd like to see the standing attacks moved higher and a new squatting attack that is close to the ground. That way you can hit enemies even when they are a block below you.
I think you should also move the attack to space bar and jump to W. Using R is an issue because I can't strafe and attack since I use my index finger for the D key.
Jumping between different environments with new attacks is a neat idea and was executed pretty well here.