I like this a lot. Like BuckySide said, it's very polished. You scoped the project out perfectly to get everything in that is needed for a full idea to be realized.
I love the music & SFX. I love the classic GameBoy graphics. Some of the jumps were hard and on a first playthrough I couldn't finish the second level, but punishing platformers are good!
I'd love to see more levels and see this idea get expanded on.
Note: Anyone playing on a 60% keyboard where you have function keys for arrows, most emulators will let you remap the controller buttons!