Really polished and giving a vibe of a game that's finished. Also the essets are used in a very creative and standing out ways - I could barely recognize most of the sprites, even tho they are obviously from the 1-bit pack when you think about it.
Gameplay-wise there is not much going on. It's basicaly logic game, where you need to collect the gems in the correct order, otherwise the planet explodes. Not much else is going on really - no new mechanics introduced, no developement, so the thing that drives everything forward is player's curiosity to know the plot.