I like that you went with a unique hook for your first game, but it's used to make levels just like every other platforming game. for instance: there's 2 red platforms forming a gap to jump across with a green thing between them, you have to jump without hitting the green thing or else you die, why not just make the green thing a spike and kill you instantly? I would like to see the color mechanic used to create unique situations that other platformers don't have.
I feel like the all particle effects make the game worse, too much noise going on, the cloudy color boxes make it hard to tell where the hitbox is. but the player effect is pretty cool.
I'm on the level that seems to require pixel perfect jumping right at the beginning (maybe level 5? I wasn't keeping track) and it's too hard to continue :(
Keep at it, just work on the difficulty curve and be sure to utilize what makes your game unique to push the game in new directions