You did leave a comment! The jam submission and game pages have their own comment sections. Thanks for the extra comment though.
I was toying around with the idea of rewarding clearing out all the goo, however there is a bug that occasionally hides goo under the walls, related to the slimes getting out of bounds. I can only imagine the rage it would cause to get 99.99% of all the goo and not be able to find the last piece. Either way I ran out of time, but I will definitely want to add this