I feel like the idea has some potential, but the levels make it kinda hard to go all out with the speed. I can see it working similar to Neon White but with a 2D Platformer style, like mixing speed and precision for a fun speedrunning game.
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I think that having less spikes or at least making them more predictable and reducing their hitbox in such a way that they can't hit you while you're still on the ground could help. Also, the default enemies have some weird properties in which sometimes they will give you a small vertical boost and sometimes they don't, making that more consistent could also help. In terms of controls I think that using the jump button to walljump would be a little bit better than just the movement keys, but that might just be my opinion.
I really liked how you can stomp to quickly gain acceleration, using that could lead to interesting situations, and the speed boost felt really nice.