Hey,
For the graphics, I agree with you. Unfortunately, I am not good at drawing, and I knew about the jam late, and I had some projects in real life, so I wasn't quite able to polish the game and make the appropriate sprites. Thank you for the Unity import settings tip; I will definitely check that.
For the gameplay, the asteroids section was easy for me, as I am the one who made the game and tested it multiple times, so I kinda forgot that the game is meant to be played by other people who haven't played the game before, haha.
Thank you for your feedback. I appreciate it so much.