Cube & Star is supposed to be an "art game". Now, if you 're familair with my tastes in games, you know it's a genre I appreciate: I can't sing enough praises for "Papers, Please", and I really liked "Flowers", for example.
Cube & Star is nothing like those. It's a pretentious mess that mistakes random word juxtaposition for poetry. You're a cube and your goal is to... what? color the world? collect useless junk? It's never quite clear. The only marks of your progress are the collectibles you gather. These show up every x steps. With x being random. And they're usually made of 2-3 polygons and have fancy names that mean nothing.
There are no lethal enemy, no interesting sightseeing (past the first 2 minutes). You can bump into other cubes or animals and A random, meaningless sentence will pop-up (and will take painfully long to fade out) before you'll continue your travels.
After what seemed like an endlessly long time, a new power showed up, seemingly at random, that allowed me to burn a bit of my surroundings. What purpose does it serve? Probably none.
I suppose you begin to see a pattern: there's nothing that makes sense, there is no challenge, no reward, no loving craft that was used to shape the world. It's all an empty, meaningless random experience.
Playing Cube&Stars would be like playing Diablo if Diablo had no enemies, was painted with pastel colors instead of grey and brown, and if Blizzard's title used a tileset that had just 10 element for generating levels.
Stay clear of this one. It's not worth its cheap price, let alone your time.