I can't say I've ever seen a one-button "puzzle" game before, pretty cool as a concept. Most one button games you see are more actiony rhythm based games, nice to see it taken in a more relaxed direction. Nice presentation, and I like the light heartedness, like the "pick any number" ones.
I also like how saying "no" to liking the music gives an Oops! like it's an objectively wrong answer, lol.