What a lovely platformer. I was going to use coins as a score then on the end screen I realised that wasn't the point (though I did manage to get every one on that last screen). I can't really think of anything to nitpick on. Great job.
My score was lives: 15, cat: 5. I thought the pink guys were enemies at first, then I tried touching one :)
Edit: and congrats on your first game jam! Hopefully the first of many. They really are amazing for creativity and productivity.