A brilliantly engaging puzzle game with a very neat mechanism for preventing frustration. Because the puzzles in of themselves were very simple and easy to solve, I never found myself getting stuck. However, because solutions were "scored" by a variety of metrics, I always felt very motivated and rewarded to try to solve them in ways which minimized time, cost, and space. The game pretty fairly explores the general style of problem solving, which is pushed in different, unique ways by some of the developer's other titles.
The story was forgettable and the aesthetic bored me. There was a certain satisfying element to watching solutions, but the game certainly could have borne a prettier, more ergonomic, and more useful user interface.
I don't feel compelled to come back to this game to improve my scores or explore user generated content; I enjoyed the journey but the whole game seems pretty monotonous to me now.