keybinds aside(which make it more difficult to play and judge the game, especially the guns part)
I don't know if guns belong in a speedrunning game, certainly not this many guns?
Placing a target here or there you need to reach is reasonable as a mechanic to have you plan your route and raise the difficulty by performing more inputs, but it's one input in dustforce(I think?) which is clean and fast, compared to stacks of targets which force you to stand in place, the antithesis to speedrun.
I beat levels 0 and 1 sloppily and did not feel compelled to unlock level 2. If you do keep guns, perhaps reducing them down to rocket launcher(movement tech) and a pistol each on a dedicated button would help make it more fun and remove the gun management portion, which I think drags it down.