I like games like this that get harder as you go along.
No issue with the medals so that always a good thing.

A really fun game

This was great! Great physics, great gameplay, creative level design too. Started getting a bit challenging towards the end but still felt like just the right amount of replays until you finally get that sweet alien reward. Really wholesome work.

-cd-

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!

Pretty good game overall. There is some strategy involved, especially with the later levels. Tricky and yet not insanely hard.

Some of the facets of the game are retreads of course, but what isn't these days?

The only reason I did not give this game a 5.0 is the issues I am having with two of the medals: the "Amazing: Finish the Third Block", and the "Crazy: Collect 75 Stars" medals. According to the game, I earned them, but they are not showing up on the Newgrounds Page.