Very good game!
This one is a game with a perfect fit as a jam game in my opinion. The game loop feels satisfying, with a simple mechanic that is yet hard to master.
The art style is overall good, for some things I personally prefer more consistency in chosen colors and also pixels sizes (if you choose a pixel text style, try scaling it so the actual pixels fit the assets for instance). But the faces of the shapes are really nice, I like the effects, the parallax effect of the background and the way you used physics for almost everything!
The sound effects and music are good as well, would like to have some more variation here: If time is running up maybe increasing speed of the music to increase need of saving more shapes etc. One thing I think could need a bit of refinement: Due to the speed of the shapes their weight becomes barely visible, but I also did not really getthe point of overloading the ship if you already sort things out...(?) Calculating all this stuff, while keeping contamination out felt veeery tricky.
For me there were no bugs and everything feels polished! I also really like that you can replay by actually kicking the replay button away. This was a very fun catch!
Overall: Really nice game!