Nyan Cat: Tap the moving cat and the video is recreated.
Ocarina 3DS: Play the Song of Storms on the Ocarina, using the 3DS buttons. The button to see all the songs works, just like on the 3DS, and I drew little icons for each song. :)
Ocarina N64: Same as the 3DS one, but with the Song of Time, and using N64 buttons.
Built to Scale: I recreated Built to Scale from Rhythm Heaven. I wanted to do Built to Scale 2 also, but I didn’t have enough points left or AI spots… Also, it’s possible to get a Superb, but you have to be really exact. I didn’t get it in the video… You also get confetti when you get a superb :)