It's short, it's sweet, and it loops! It's puzzlehz! Remember all that information you learned in high school about waves and frequencies and you wondered when you'd need to use it outside the classroom?
Yeah, you still won't need it. The concept is simple: watch the thick green line move across the screen and try to make the thin green line match it. You're probably thinking "I got this." You do, but you'll need to think differently with each new wave. The game consists of horizontal and vertical sliders that you'll need to move in order to make the lines match. Some levels that makes for a pixel hunt, but don't worry, that's only once or twice.
puzzlehz is short and will take 5-10 minutes to complete. You'll only know it's done when you think "Haven't I seen this before?" You have. There is something cathartic and at the same time aggravating about puzzlehz, but if you're looking for a short time waster, look no further.
Note: the game is a unity game. You need to use a compatible browser in order to play the game. Mozilla for instance.