Five stars! Let's see what fun games I popped up! I love the music, it has a quirky and lively feel to it. The game idea was also fun, and it occurred to me that it could also be done by memorization.
For example, it starts off with a top and bottom grid, and you're on the bottom grid, and you need to press the top, and it's all pretty normal. From here, you could set it up so that the top grid disappears 1 second after it appears, and then the player needs to complete it under the order of disappearance. Of course, this is still easy, but when there are a lot of squares, relying on the disappearance order can be challenging.