Great stuff, I liked your implementation of the "bridge-builder" mechanic. Doesn't seem something so simple to do but it worked well!
Art was on point as well, it was consistent and the style fits nicely with the gameplay.
At first I had trouble understanding the interplay between the character movement and the building mechanic, but then I realized that the point is to climb through the structure as you are building it. To emphasize this, I would consider not giving the character an infinite jump, to make sure you have to climb the structure instead of just levitating to the place you want.
Awesome job overall!