It has bugs like most game jam games do (mine included), but it's really solid, complete game. It even has a cutscene which was a nice touch.
The art is nice - but I don't really like the pixel density difference between different elements - for instance, the background sometimes is way less dense than the spaceship or the planets. And some planets seem to be rotated 45 degrees, and I personally think that doesn't look too good in pixel art (save for a few examples like in terraria)
The animations are good!
It really seems like the team went for a simple idea that could be finished and polished, which is always a great decision in gamejams. Good job, this is a good entry.