If the collectors explode, you gave them too many particles and the level will not finish. Try adjusting the placement of the pieces so that fewer particles get to the collectors.
I liked it. Sliding around is kind of annoying, but you have to take into account you are playing as fire which has very low mass and it is on ice which is notoriously slippery.
The description is spot on when it says "hours and hours". I have played for a while now and found that most of the time is spent running around in circles doing 4-7 dmg because better guns are so expensive. I like this game, but either give more money or make weapons a little bit cheaper.
What is up with the copo? It looks really weird and so far has the weakest powers. I mean a spit attack that does 8dmg and takes three turns to charge up? Glad I did not have the option to play as it.
DVDs > VHS