Nice job, @-kippie-! Glad to have you join me for this Goedware Jam and I had a blast playing your game. Awesome to have a couple Scratch entries in the mix here :)
I'm going to start with what I liked. For one, I think you implemented both the shape limitation and the limited space theme extremely well. The world and gameplay feels rich and unique, even though it's composed solely of circles. The whole gameplay and mechanics perfectly encompass the "Limited Space" prompt.
I also enjoyed the music + sound effects - nice choices.
One thing I found difficult was the controls. As mentioned by other people below, the WASD doesn't quite synchronize well with a circular planet and the inversion when you are upside down.
If you're planning on continuing work, I'd recommend adding more small animations and particles, which would make the player experience feel more polished. In particular, an enemy death animation would be cool. I understand niche adjustments like these can often be overlooked in a jam as short as this one, but still - I'd recommend it.
Overall, I had a ton of fun rating, and I wish you luck for the results! You did a great job interpreting the theme and working around the shape constraint.