Did you even play test level 5? 3 clouds and no upgrades vs 2 enemies, 4 clouds and 5 upgrades apiece? That's ridiculous.
It CAN be won. I spammed Yellow as fast as possible right off the bat, took over his clouds and lost mine, and gathered stars for production upgrades just in time to swing the tide against red...after a few dozen tries. That was based way too much on luck.
Graphics and music are good. The game type is pretty generic tbh, and the level designs don't bring anything new. I would have given it 3 or 3.5 stars if not for level 5 and I think I'm still being generous.