Too hard for me but pretty fun nonetheless. The patterns on the later stages very quickly become actually impossible as even when there are gaps the gaps are smaller than your hitbox.
Also managed to make it freeze when I completed a level 5 board on stage 2 by pure luck. (It was an "impossible" pattern but it took like 5.01s to reach me so it counted as a win.) I could hear what sounded like coin sounds as the music got slower and slower. I gave up waiting after a couple minutes and closed the tab.