Do you find that sometimes you must perform boring, repetitive tasks, that don’t really require much thought? Do you need to take an occasional break from such activities to exercise your brain a little? If so, Jelly no Puzzle provides an excellent means.

It has an extremely simple premise: each single-screen level is populated by different color jellies, which can be moved left or right. When jellies of the same color meet, they merge into a larger jelly. The goal is to bring all the jellies of the same color together. That’s it. But don’t think that it’s going to be easy. Jelly no Puzzle is actually one of the toughest puzzle games I’ve played in a long time. My elation at solving a level was followed immediately by disbelief that any human could actually have designed it. Ordinarily, I would have found the game quite frustrating, but a few simple design choices prevented this, and kept me coming back for more.