thanks for playing! Rebindable controls are on my todo list, to be honest the last platformer i played on a keyboard was Iji so I think that is where the control scheme came from. I agree that the one spot you need to stand in place to shoot a column of targets with the machine gun in level 1 kind of suck, it totally halts your momentum and there is no better way to break those targets.
Guns are definitely staying but i think your point about the gun management dragging down the gameplay is fair. I'm not sure how much of a pure speedrun game this will be in the future.
You are the 2nd person to mention dustforce so now im thinking I should really play that.
Feedback is much appreciated