Graphics are good and the audio is ok. The dimension mechanic is interesting. It took me few minutes to be comfortable with the controls, after it was ok, but the wall jump mechanic is sometimes hard and not satisfaying.
I didn't passed the 4th level, maybe if you could slide more in the wall i would success, but i can't wall jump enough to be able to dash on the plateform in the other dimension, and the spike hitbox kill me when i'm on the wall, I also can't wall jump on the right plateform cause i don't jump high enough, so i would say the spike hitbox is the problem.
If you're too close to the edge of a plateform, you'll slowly start to slide.