This is really good, especially for your first game! I really like the level design, very clear Mario/foddian game influence. The level design was very cool, the platforming difficulty was really solid. Some of the physics felt a little tough like the enemy hitboxes and in-air control. I also think some kind of "You Win" screen or notification would've slotted in really well.
I'd definitely recommend adding some cover art and some screenshots to improve your submission page, it looks pretty bare at the moment. I also think some of your project settings may be misconfigured in Godot, the game page shows the game as super small, and the full-screen just extends the border rather than zooming it in. I believe it's the Window>Stretch setting that you may have disabled, switching to "viewport" may fix it.