Great concept! I got stuck on the first puzzle for a while because I'm color deficient. The Yellow and what I'm assuming is green looked the same. So it took me a bit to figure out that combo lol
I also got stuck on the 3rd puzzle, I just couldn't seem to figure it out, might just be me though haha
--EDIT--
Forgot to mention, I didn't hear any BG music, just the SFX