When you told me you were going to make a katamari sea game I was worried the main mechanic would be hard to pull off but you have done it with ease! I think 2 ways that mechanic could be scaled to emulate katamari a lil more would be that trash can stick to the other pieces of trash on you also, then it makes it harder to roll and more frustrating as time goes on.
Great concept and amazed you pulled it off so well in the jam! <3