New build, new song, and two new levels

Kind of a big update today. I've made a quick level selection screen. You can pick from three levels by jumping on buttons. Levels 2 and 3 are very experimental. They feature pinwheels you can flap at, and rails you can snap to.

There's more music in the works as well. There's a new song in the level select area, and you can hear a possible future level song here: https://soundcloud.com/spencer-riedel/fleder-wip-3