Really neat game! Took a while to get used to the walljump timing, wish there was a way to practice it better since you have such limited time. When I got used to it though, it was really fun! The last level's easter egg (you can go through where the title is) was neat to find accidentally as well! Well done :)
My only feedback would be to lower the volume of the power up: it was kind of loud in comparison to the rest of the game.