I want to preface this by saying these are the suggestions and not instructions you have to follow. I know you are an artist first and love your work, so please don't take this as me bashing what you already created.
I've not yet played the v0.2.2, but did play the v0.2.1. The platforming feels a bit... wack. I think you simply add upwards momentum to the character when she jumps, but that means that as soon as she hits a ceiling she drops like a rock. It would be better if she stuck to the ceiling for however long it takes for her to reach the top of the jump ark, and then start gaining downward momentum, all while still being able to move left or right. Also not sure if you have a cap on the downwards momentum or not, but you should. And I'm also not sure if you have coyote time (a short period of time after walking (without jumping) off the ground when the jump is still usable), but even if you do it feels very short. And so the character feels like she's slipping off the edges. Which feels especially bad with one hit kill spikes everywhere. You should probably remove those, or at least make the "teleport to safety" animation faster.
I really love what you did already. My own projects never reached even this far, so the shear fact that you have a somewhat playable build of the game is a huge accomplishment! Good luck on creating more!