Thanks so much for giving it a play and the constructive feedback.
The inconsistent bounces is definitely an issue. I'm calculating the physics in a dumb way and it manifested as such. Time constraints made me press on with other things though. Since I knew it was beatable I left it as is, but once the voting period is over I'm going to go and fix it up a bit.
I knew a couple of my design choices might be controversial i.e. the small jump and camera. The jump I wanted to force reliance on the mushrooms, I actually debated not having any jump at all. As for the camera, I stick behind it. However I'm sure my level design could use some polishing to really take advantage of the camera movement. I think it subconsciously makes the player count screens, which gives you a real measure of progress. You know exactly how many screens you've conquered, and you know exactly how many screens you've lost when you fall.
But I am rambling now. Thanks much again for the play and the feedback :)