...From the horrendous Guitar chart! Badum-tsh!
Yet another great Legacy keys chart this year. Fireflies offers keys players a great mix of fun and challenge. It's split into two key parts, the first half is a series of steady single notes that have your fingers moving from left to right at a fairly steady pace. There's a nice amount of variety here, and it gives your fingers a good workout, preparing you for the difficult part of the song.
A long string of notes traveling from the right hand of the screen to the left, mainly alternating between O,Y,G and B,Y,G. This part can prove a bit tricky, but it's actually kinda soothing once you get in the groove, and you can kinda space out to the nice ambiance and the groove here. It switches up a second time adding movement up the keyboard too.
Both these parts repeat twice before finishing off nicely with a steadily decreasing series of notes consisting of O,B,R.
Fantastic Keys, and I'd even go as far as recommending to play this on Guitar over the actual Guitar chart, much like "Never Gonna Give You Up".