I'm a sucker for a good platformer, and this one definitely delivers a proper challenge. I was afraid of the slippery feel to the running at first but it became completely natural in the first stage. I see lots of potential with using the princess to help with puzzles and platforming. My only gripe is not knowing where the princess will land as you throw her-- while it became a bit easier to predict in stage 2, a small visual aid would've kept me from fearing I'd accidentally lob her down a pit, haha.
On top of the challenging gameplay, the graphics clean, readable and scaled well, and the audio's crisp and present enough to add atmosphere without being distracting.
All-in-all a great entry!