This looks really solid and ALMOST feels great to play. It might just not be my genre of game, but I found having to manage that many keyboard presses alongside tight jump timings to be pretty intense (direction + dash + timing a color shift.) It would have probably felt a lot more natural on a controller.
The movement also felt kind of mismatched for the precision the levels required (which I know is basically the pot calling the kettle black considering my own game's problems.) Jumps almost always sent me flying farther than I wanted to go (or never quite far enough. Trying to land on the tops of those thin vertical walls was pretty janky.
I expected to just fall through platforms that didn't match my color, rather than them being "deadly". Kind of a minor complaint, but felt a little overly punishing.
Fussing aside, music fit well, aesthetics were spot on and generally lent themselves well to the game's vibe. And like I said, I have a feeling this just wasn't my kind of game. FWIW I also don't think I'd have a good time with Celeste, so if anything you're in pretty great company there.
Found a bug by the way. On the... fourth or fifth level? The one with the upside down cacti and exit door - I fell after making everything turn gold. My character didn't reset back to the top of the level like it had in previous levels and instead got stuck outside the world. I tried dashing repeatedly to get back up but I guess it was caught outside the map border's colliders or something. That level skip option was a really smart addition to deal with things like that. Great job!