Cool concept! I liked the art a lot. I never quite understood what the yellow thing I was holding was, or what it was doing when I pressed space. I also accidentally skipped the tutorial screen, as I was pressing space since that was what the first screen told me to do, so it took me quite a while to realize that I was sprinting from pressing movement keys twice in quick succession. For a while I thought it was random, and I think the fact that it would still activate even if you pressed a different movement key in between to two presses of the same key didn't help with that. I found the footstep sound a little tiring after a while. Adding some pitch randomization and even a couple other sounds to randomize between would definitely help a lot with ear fatigue, though I think the sound you chose might also just not be the best. I didn't really understand what was happening in the end screen, or the sudden change in tone with the music. I loved the rest of the music though. There's an interesting idea here, I think it just needs to be polished up a bit more.