suteF is a free indie puzzle game that has a lot going for it. It's dark and weird, and the puzzles are very well designed. You play as a little blue man whose main objective is to reach the static-screened monitor in most of the levels, which must be done by flipping switches, pushing boxes, jumping onto ledges, and by utilizing gravity-inverters, screen wrap-around effects, and your grappling hook. All while avoiding certain death from laser beams and other nefarious obstacles.
The puzzles are generally clever and challenging. The solutions aren't always obvious, which makes it satisfying to beat a stage and progress to the next one. Gravity-inversion isn't one of the most original concepts in a game, but the other unique elements of suteF keep it feeling fresh. On top of everything else, the atmosphere and general premise is enough to be intriguing with retaining some subtlety. It's worth a playthrough, certainly. You can get it here.