Very cool puzzle game. An original and seemingly risky idea too but it works. The only negative I can think of is that I'm not 100% sure on some of the AI patterns but that's probably due to my lacking in intelligence and patience.
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I am glad you liked it!
I had the same doubts about the movement patterns. They are deterministic but except for red triangle & square hard to predict. I often run the level to see how the shapes move and then make a guess how the correct wall placement could be.
I am thinking about adding tooltips on the shapes that show the movement pattern. But I am not sure if that is actually an improvement. Maybe it is more fun to guess & retry than to do the brain twisting calculations what will actually happen?