I like the concept of using the recoil and momentum to manoeuvrer around the level. The level layouts were interesting, and I appreciate the gradual introduction of enemies and concepts.
I found the aiming/walking controls a little awkward, specifically when hitting the ground and walking into the direction that I was aiming. This lead to a lot of my retries on the final level as I would accidentally walk off the ledge as I tried to aim right, and then walk off the right side of the ledge upon touching the ground. A potential change could be to forgo being able to walk left and right, and dedicate the directional buttons for only aiming.
I like the graphical style and the music - they complement each other such that it gives the game a retro aesthetic.