That's a project I though I lost long ago. I was working on it on my PocketCHIP, tell you how old this is and had an issue with it and needed to reinstall everything and lost all the cart I was working on, this one was one of them, and I'm delighted that I had a copy somewhere else.
So this one is date from the 19 May 2016 (at least last modification of the file) and was at a time I was playing around trying to replicate exisiting music in PICO-8 (as for the Megaman in another cart of mine already published here) Also had fun working on replicating the screen from the original game.
I really like how the two song render in PICO-8, I'm pretty sure I started to work on some other but lost all the work :(
Hope you will enjoy!