Pico-8 Love. <3 If you have pixel art with the Pico-8 palette you can't go wrong, the game looks really nice. The jumping mechanics feel a bit weird. If you'd add a few levels with moving obstacles and enemies and a bit nicer jump mechanics I can see myself having a lot of fun with the concept. Great job, especially because it's only your second project. Art is hard, getting mechanics right is the easy part and you got the art part down. :P