Hello, Cool game I do have a few qualms with it though.
aiming is difficult and the knockback feels like its not under control. The knockback is also inconsistent, sometimes it wont move me at all and other times it will shoot me off the edge instantly.
What I would recommend is that you add an effect when you shoot the gun to make it feel more like its the knockback moving you.
And for the movement I presume you just added or multiplied the velocity, there isn't much I can say for now, I just suggest that you keep learning more techniques and have fun.