This was really fantastic!
What I Liked:
Art was amazing! The witch looks great and the walking animation too - also the static standing still animation is a nice touch. Animation & sound effects when shooting a spell looked nice. Bats looked nice, trees looked nice, portal looked nice...
The opening menu is a great touch, and seeing the pumpkin explode is a great way to teach the player that that will happen.
I think you did a great job w/ tutorials and teaching the player how to play. I know it isn't easy in a jam, but really appreciate it!
I love that you really went all-in on the Halloween theme. And good job following the gameplay theme! I think it made for some interesting puzzles!
What I Would've Liked to See:
A bit of juice when you take damage (from your spell too) would help with gameplay, I think.
A nice, starry background or something I think would make the game look really good.
When pressing Ctrl in my browser, it would try to bookmark the page (was this in purpose XD).
All-in-all, really great job with this - I had fun playing!