Ohh medals, this better be good...
It's a very good game, but not challenging.
I've played up until level 33 so far only one level has taken more than two tries (one red alien just refused to fie on level 29, but I managed in the end)
In fact the only challenge so far is judging the somewhat floaty jumps. on level 33 I found myself jumping out of the visible area and landing to my death.
Seeing as the game provides no interest or intentional challenge, I'll stop playing here.