Very original concept, I like the idea of keeping dice in the air until you're happy with their number and let them fall.
At first it wasn't clear I was supposed to let them fall, I thought the objective was to keep as many in the air as possible for as long as possible, until one fell and it said "+1" not "-1" and then it clicked.
Only issue I'd had was sometimes dice would be on the ground ages before they got converted to points. Otherwise, nice job!
I'd love to see this concept built on