A nice platform game with a good combination of intellectual and manual challenge. All the stars are possible to collect, althouth some levels were a bit frustrating for me, but it's not because of any bad programming, design or anything like that, they are just much harder than others ;-) I mean the ones with both razors and moving lasers on a same stage especially :-)
Also all medals are unlockable, but in my case it was somewhat weird:
1. The medals were appearing on my account but
2. They were not showing being unlocked below the game screen and
3. There was no Newgrounds notification that the medals were unlocked, but what is good that the game has its own notifications about the achievements.
Final outcome: almost 5 stars!