Playing around with gravity never gets old. Is such a great platforming mechanic. The spinning hat is a nice touch. Is the character named Juniper, perhaps?
I enjoyed the game design. It felt like Celeste, every mistake it would immediately take you back to try again. That keeps the pace of the game, and engagement.
The controls need more refinement, as well as the hit-boxes of spikes and other obstacles. When they are too strict, too pixel-perfect, it doesn't feel fair for the player.
The horizontal movement could start slow and accelerate over time. Same with stopping, adding a bit of slide feels great. A couple of pixels extra in the jump landing, so you're more forgiving when landing next to a hazard. All of the above, are some improvements I think would take your game to a new level.
Specifically for the spikes, make them bigger, or more noticeable somehow. On occasions, it took me multiple attempts to realize I was hitting spikes.