"design-based puzzle game"? hardly. this isn't a game. it isn't a puzzle. puzzles are when you put little pieces of cardboard together and make a picture.

this is what you get when you cross nuclear particle physics, molecular engineering and computer science. it will make your brain hurt more than a four year degree in biochemistry. you know you're in for some thinking when the game provides you with a handy copy of the periodic table of elements: you might need to know how many valence bonds a particular element has.

each challenge is exponentially harder than the last. just barely scraped by on this one? good luck on the next. and if you wanna have fun, it posts leaderboard stats. people COMPETE for fewest cycles, fewest nodes, etc. the most elegant, simple designs win. you might struggle to get one to even work at all, but somebody did it in 4 nodes, and only using one path.

get this game if you want to feel stupid. if you want all your other games to look stupid in comparison.