I heard about this game years ago, thinking "it's really cool, but is it really fun to me?". I decided to take a shot, because massively borred about games in general nowadays (grinding is really not fun anymore). I didn't expected to have so much fun. Reflexion and creativity are the only limits to get stuck. Infinite solutions (maybye few perfects or close), and always a way to do better, with no ubber complicated stuff, just some basic commands, and logic combination. You try again and again until it works, not because some unbalance or cheated AI, just your mind not enought effective. There is also a little Trackmania effect with the effectiveness graphics at the end, wich push you to de better. I almost spend 3hours just to /2 the cycles of my shemes, reviewing entirely the reactions. Must have indeed for who love logic, combination, challenges and puzzles.