Thanks! I struggled to think of any more actions that I could implement in the time limit but I'm sure there are loads of possibilities. I was imagining a way of splitting the flow of creeps so some go one route and some go another. This would enable things like sending some to press switches or weigh down see-saws. Maybe something like the original lemmings of using a climber or similar to send a few out early to clear the way before opening the flood gates.