You won't believe this but I had plans for adding (almost) all of those features you mentioned! I was just short on time because I am not very good with time management, moreover it was my first jam so I didn't have the skill of developing games in a short time. That's cool that the things to improve you mentioned align with my ideas, that proves that those additions are important. I even started coding camera follow marble system in the last day but quickly realized that I won't make it on time. After the voting period I am definitely gonna add all of those things! Thank you for the review!!