Fun little concept! I like the idea of a platformer where you actually have to create part of the platforms yourself when playing, I don't think I've seen this before. The amount of gameplay is actually impressive for a solo dev, so congratulations on the amount of progress.

As a gameplay improvement, I think it would be great if the mana regen would be a bit faster. A few times I was stuck halfway through on my own platforms as I was waiting for more mana. Maybe an interesting mechanic would be to not only have a conversion of mana to health, but a 'sacrificing' mechanic the other way around (so health into mana)? I noticed that killing enemies gives a big mana boost, so after some time whenever I got stuck I tried getting more mana faster by killing enemies from a distance with the staff.

Some general tips:
* Put a few screenshots and gifs on your game page. The art will attract people if they see it before having to download the executable.
* When executing the game, I got a Godot error indicating that I did not have Vulcan drivers installed. I had to create a shortcut, and give that shortcut the `--rendering-driver opengl3` parameter in order to run the game. I do not have any hands-on experience with Godot, but I'm sure you can change something in the build settings to also support OpenGL when building.

An unexpectedly complex game, which is a pleasant surprise. I think the combat is a bit difficult, considering that the player has no means of defending themselves, but the magic system is cool.