To some extent going for lower angles to get boxes out of the way faster helps, but I'm sure it's way overbalanced in favor of chaos at the moment. I did experience stuck boxes when I was testing, but they tended to find their way out eventually so I put it on the backburner. I'll revisit again, possibly I just need to add a minimum velocity to bounces. There are bronze/silver/gold targets for each level; the bottom right tracker is meant to update as you pass them but it did bug out fairly often when I was testing, especially when the level was changed. I think I've got a slightly better idea for how to display those targets anyway now. Generally the bronze is ~50-80%, silver is ~100%, and gold is the amount of score you actually get for 100% of the boxes with the streak bonus(es).