Gravity Falls Piano Magic - Colorful Efect : Welcome this is a very fun game for Gravity falls fans. Well, PIANO games with very favorite songs from gravity falls theme song. how to play is very simple. You can just fill/tap in the black tiles and follow all the songs that are available on the song list and get 3 stars for each song so you will be the winner. We are here to help with our brand new piano game! Your favorite song is here at your finger, Gravity falls Piano Tap is the best piano tap games. Disclaimer. This game is not an official app. There is no copyrighted material, everything we make is done by us including the piano music!