No idea yet if I'll be able to finish anything, but here's what I'm looking at right now anyway.
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The idea is that you have to hold the gates up for the character to reach its goal. You don't control it, it will just dumbly try to reach the goal. Well not so dumbly, I'm using (and learning) Unity's navigation components so it's pretty smart about picking a new path if a better one opens. I'm hoping with more complex layouts it could make for interesting gameplay…