Thanks for the kind words. It's a very short loop that took an inordinate amount of time for me to create. I used the music tracker that's built into Pico-8 and just stuck to square and noise waves to keep the Gameboy feel, though anyone who knows what they're hearing will see the difference. The bass drum sound is just a low note in a square wave with a drop effect applied (not that I could tell what that means!) and the hi-hat is noise 4 octaves higher played really short.