Nitrome has a new game out, and it's a sequel to one of their most popular puzzle platformer series. Test Subject Complete picks up where Test Subject Blue and Test Subject Green left off: you're still the little blue blob of enzyme in a kickin' mech suit. The stakes are higher, though. Your suit's been spying on Doctor Nastidious, see, and it turns out that he's planning on using you to take over the world. Your only option is to get out before he puts his nefarious plan into motion.
The gameplay hasn't changed much since the previous installments in the series: use the [arrows] or [WASD] to move, and [spacebar] to fire your blaster. However, now you can walk on the ceilings by jumping up against them. The portals transport you while conserving your momentum, the lasers and enemies kill you (but you'll get better!), and the buttons toggle or disable lasers and portals. The goal is still to grab the key and then head to the exit, where you'll *glomp* onto your target and get sucked into the next level.
Nitrome has really taken feedback from the previous games in the series to heart, and has fixed most of the really annoying problems in the form of this awesome new suit. Now your blaster fires without delay, and the movement is much less finicky than it was before. The upshot of these fixes is that the challenge of Test Subject Complete is primarily in the puzzles and the wide array of enemies, not in trying to find the exact pixel to aim for in order to reach the next platform, making for a satisfying chapter of a well-loved series... about a little blue ball of goop. Ew.