Was a really nice take on the brief and I really enjoyed the fluidity of the transition between 2D and 3D platformer so well done.
There seemed to be a whit box that remained at the bottom of my screen as I played and made things slightly confusing at times. Also I couldn't get past the bridge when you first learn to switch between 2D and 3D as my character was unable to get up onto the bridge either by walking or jumping.
Really sorry to hear about your development disaster. Would love to see what the final product was going to be. Nice work on what you uploaded though.