Oh, thanks for such detailed reply!
I totally get that about the introductions — I was really happy that I could squeeze an animation into my game, but even that was a lot of work and I have just one mechanic in the whole game.
It was exactly the shotput that tripped me. Anyway, these compromises are totally to be expected when trying to do anything in <48 hours. I had reserved just 6–8 hours for the jam and in the end I spent 12 hours working on it late into the night.
And one more thing — I already spent more than those original 12 hours post-jam just trying to reorganize my code to squash some weird bugs in the game. So good luck with the rewrite! I can wholeheartedly recommend starting with clean slate and well designed outline and only then cherrypicking from the code from the jam :D