I let an AI design LEGO-style models, then wrote code that decides whether they're allowed to exist

I'm one person with four iOS apps released in September. This is about the one I found hardest to get right: Brickium. The idea: you list the bricks you already own, say what you want ("a small car with four wheels"), and the app designs a model from only those parts, then shows step-by-step 3D…