Shiny grafix, interesting physics, simple gameplay, and a cuteness factor of 9 all come together for a pretty fun game. I really like the hint system, although I am unsure as to how effective it is. I followed the hints for lvl 5 and found that the solution provided didn't work for me.
Also, Lvl 4 does have to be manually restarted.

in some levels the bad bubbles go throu the walls. A good game though.

This has a lot of potential. You could go two ways: A family friendly but still fun game, or a mutilatingly gorey one.

Either way, I think this has what it takes and is able to be super awesome.

I found this submission quite easy to play and entertaining, a new take on the physics puzzle genre as it allows a 'careful destruction' rather than precision and balance.

Nothing really to suggest apart from the possibility of adding a count-down at the end of a level after the enemies have hit the spikes which shows if the player has managed to save the friendly or not.

Only one glitch is that sometimes a friendly unit can stay alive if they fall on the spikes to the far left.
All in all a fun play, 4.5/5 :)