This is awesome! Super impressive stuff to have built this without using a game engine in the time you had for the jam!
I love the fact that your perspective is diagonal so you can only climb the walls you can see, and you have to press two movement keys to move. I could see some really cool interesting puzzles being made with these building blocks (pun intended).
C.L.I.F.F. 's movement is so smooth the animation is really really good, watching it traverse from floor to wall is a joy.
Well done both of you!