Works as indented (by this I mean it's programmed properly, no bugs, no lags etc), and that's almost all the good parts.
The balance is a mess. Sometimes levels are a breeze, because stars are popping up one after another near our clouds, sometimes it's impossible, because we can't reach them. There is a very nasty RNG involved and it spoils the fun for me.
That's even sadder, because the upgrades are fairly balanced; each have its own use, but it's also spoiled by RNG. If we can't support a lightning cloud for star grabbing, we can just reset the game on later levels.