Thanks! Our artist SAW MANKLER is the best! About the gameplay, we chose to disable horizontal movement while jumping exactly for the realistic feel as you said, but we didn't have too much time to playtest so I agree it feels clunky. About the input delay, movement has a stopping delay (to simulate inertia) but shouldn't have a starting movement delay, so its probably a bug. We also faced some FPS drop while testing but we didn't have time to solve it in the submission phase of the jam.