So fun that I nearly forgot about all my frustration as I played through it... and the easter egg at the end (I won't spoil) made me actually laugh out loud.
Your submissions are always impressive, but this one takes the cake. Took me until the end to realize what I was building.
My major gripe is the difficulty upon entry. I chose the wrong axis to move everything by, and it turned what was probably an easy level into one where all my timings were off by a lot. I was mad because I liked the cool beat I made, but then I had to ruin it to get within the proper timings. For some reason, the first level also forced me to get near 100% centered on all 4 dots before it would advance me forward. Also took me longer than I'd like to admit, that I needed to click then drag, instead of holding down the mouse button and immediately dragging.
However as soon as I adjusted my behavior into what the game expected, I was taken on a pleasant, well thought out journey, where I was delighted by what *I* made at the end. Masterfully designed and evoked a lot out of me for a work of art made in 10 days. The ending reminded me a lot of playing Parappa as a kid. Thank you!