I enjoyed my run, I finished the three stages. I think you have a good theme, I liked the main character and the little watermelons.
Personally, I think your game could benefit from more consistency. If your game is mainly a colorful pixelated retro game, instead of a realistic scream when you die, you could put a really short jingle. When you jump on a monster, you could have sharp pixelated particles instead of blurry diffused one.
I had fun playing, thanks for submitting your game!