Ok so here is my full opinion.
If anything sounds a little harsh it's not meant to at all, I think your game is great.
Particularly I like the animation and all of the layers in the graphics and the idea.
Graphically I feel like some of the effects clash a bit with the style. Mainly the fire power and the waterfall effect. They jump out in a way that makes them feel a bit corny. I'm not sure how I would get them to mesh better, but for example the cloud effect on the mountains in the background is an example of an effect that meshes well. I think if it works well you barely notice it's there.
I'm running the game on a laptop with an intel i5 processor at 2.3 ghz and with 8 gb of ram. I played the lowest setting and didn't notice too many performance issues, there was a spot where 2 spiders were on the screen and one of the elks and it got a bit choppy, and seemed to stay that way for a while after. Not consistently choppy though, just sporadic jerks here and there.
Control wise, I don't have any problem with using WASD, but I feel like I would use the arrow keys for movements, and WASD for the magic powers instead. For most people I think their right hand is their dominant hand, so it would probably make more sense to have that one in control of the movement.
I might speed the wolf up a little bit, but leave the jumps a little slower like they are, just to give it a good flow.
I found the branches a bit frustrating. I feel like I would change it so the branches on the same tree that are parallel you can run straight across, but you can't stop in the middle. That would make it feel a bit more fluid and more fun to jump around from place to place.
I think the spiders work alright as an enemy but would figure out something for them to do instead of just waiting for you at the edge of their platform.
All in all I find this pretty inspiring, I'm glad to get to play an early version of it, and want to encourage you to keep working on it!