Piano Tiles (Tweet cart edition)

Made a minified version of the arcade/mobile game "Piano Tiles", 

HOW TO PLAY

The game board shows the next 5 notes you need to play, the note at the bottom of the grid is the one you need to play next and its sitting in its corresponding lane to one of the following keys  Z X DOWN or RIGHT (the glyphs should illustrate this) this was in an attempt to have keyboard input sit on what should hopefully feel like natural left and right side of the playing board.

Its GAME OVER if you select the wrong note, I didnt put in a restart option so you'll have to press ENTER and select "RESET CART" to play again.

I did have a countdown timer in there (which jumped up slighlty each note press) but ended up at 508 tokens and couldn't squeeze it down any further (save for making my update loop mad messy and I ran out of patience at navigating the minified code).

Technically the sound pushes the token limit over but the game still works in silence, anyway enjoy!!