Note: It took some time for me to get back around to finishing comments on the jam games. Pardon the late comment!
I found the spiral path to be really interesting right away, but I also enjoyed the combination of bullet hell with color-matching the stones together. Combined with the colorful visuals and the high-energy music & sounds, it was a very fun arcade concept with excellent execution!
Also, buff Touhous are a pleasant surprise. ^.^