That's a 5/5 for me. Holy crap that was well done. I love the music! It felt like it really belonged with this game. The jumping sound and wave activation sounds are perfect. I don't mind hearing them a lot. Gives the game a lot of character.
The challenges were just hard enough that I didn't get annoyed by losing so often haha. I felt like I really had to practice my wave air travel in order to progress and it felt rewarding to finally get it. Art is great and simple, but informative.
Really cool submission!