It is a very polished and well made game, it's quite fun :) It kind of reminds me of Infinifactory, which has a similar premise of augmenting, arranging and combining blocks together to fit the shape needed. Your UI design is great, I really like your screen transition.
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I've actually been thinking of adding a leaderboard similar to Infinifactory, with something like the number of machine you used and the least conveyor and such. But for simpler level, since there's only 1 solution, it doesn't really make sense. Would be nice to have something that brings the game out of the game in a nice competitive way tho.
And thanks for playing, I'm glad you enjoyed it!