Really nice little platformer
I really found the nice little additions like ledge grabbing and bouncy mushrooms really touches. I also noticed that the jumping was a little awkward at times, but my computer's slow so it's probably more my problem than the actual game.
The simple but well constructed graphics were also very appealing.
My only suggestions would be the addition of frames per second correction, but it's a little annoying to add sometimes. Other than that; great stuff. I hope to see more in the future :D