Simple, but very good game. I love the art style, and the mechanic of the "jump" that give some difficult. I like too that when plataforms are visible the music changes. It's a very good game, and it's a great achievement to have made it on Pico-8, which from what I understand is a very limited platform. Congratulations, 5 stars.
By the way, you have my humble game here if you want to try it too.