This game is absolutely frustrating and the level 8 trap (not the actual trap, the "trap" trap) was a bit over the top... It was absurdly hard and had I not been capable to waste almost an hour at it, I would have taken it as impossible. it was actually much harder than the final boss.
As a suggestion, try to tune it down a bit, or, at least, add difficulty settings.
Next: Lagging. It only makes everything harder, next to impossible (one would have expected to ease up since there would be more reaction time, but it's the other way around in this game). Tends to go away from time to time (unstable)
Controls and playability. THEY SUCK. Period. If you disagree then you must really like ice skating, changing directions like a madman and jumping always at the exact same height, ever.
Graphics. Not bad, but not very good either. i'd say "good", more than sufficient.
Music: Good pick, fitting for the whole setting.
Difficulty: Above hardcore. This shouldn't be played by casuals in any situation and I'd say not even by experienced players for the medal on level 8. It's pixel-perfect maneuvering which, thanks to the game's crappy control response, becomes infuriatingly frustrating.
Overall, it's another "I wanna be the I wanna be the guy" game, could have been a lot better though.