I don't think designing a game should start with the idea of, "What if we took a typical game of this style, then added a cumbersome set of mechanics that made controlling your character feel really unpleasant?"

That's Mable and the Wood, through and through. Uniqueness created by unusual movement and combat doesn't make a game better in most cases -- it just makes it different.

Climbing Mt. Aida in this game is a great example of where it all falls apart quickly. The fairy mode is essentially too slow in most cases to get up the mountain past the giant spikes that shoot out of walls (which are one-hit kills). The spider mode asks you to tether yourself to objects that are off-screen, which means you need to die enough times while shooting yourself at angles toward ledges above you to know where they are so you can pull yourself through. Also, broken hitboxes for the spikes, but that's another story.

Is it possible to take a different route at that point in the game? Maybe -- there's a lot of walled off paths and the map system isn't exactly useful about clueing you in on where you should go, so the mountain is the natural progression path after the first boss (to me). It's doable, but that doesn't make it fun.

At least it looks really nice. Steam offers it on sale at times for 80% off. If you can get that deal on whatever your preferred system is, give it a try.