I really enjoyed playing this one!
The music and particle effects add a lot of life and colour to the game, and my only constructive feedback would be to balance the difficulty a bit. Some parts of the game were too easily handled by just jumping on the echoes while other bits had slightly longer sequences to replicate if you missed a jump.
Just a bit more polish and this could be a shippable little gem!
Do check out our game Reverb. We'd love to hear your thoughts: https://itch.io/jam/pjp-game-jam-2023-1/rate/2079583