I love the visuals and sfx a lot, they were VERY well done!
But the mechanics feel like they were either rushed or unfinished. There isn't really any goal that I could find, you're supposed to "match the colour" but I found that I could ignore that fairly easily (and if I was supposed to be punished for that I didn't really see it?), and I don't really know why space had to be held in the first place for the colours to be revealed. Not to mention that swapping colours was a bit awkward, especially if you were wanting this to be a rhythm game.
I might've been missing something, and if I did then that was partially on me, but I do think clarity would help going forwards.