I'm bias for platformers so you already won me over with that part, but the way the game unfolded was brilliant. Even though the challenges were relatively easy, it required a bit of thought.
A platforming veteran like me could figure things out kinda fast, but you might turn some people away in the beginning by giving the wrong directions with little hint to the real directions. I had to fiddle with the keyboard for a minute to get it right.
Also, ending 2...great job.