It may sound like a cheesy cocktail bar, but Moonlights is actually a dangerously addictive physics puzzle game. It’s a flash based browser game, very much influenced by the excellent World of Goo. You have to build a frame from a certain point, so that it touches the moon, but your building material is kind of rubbery. This means as your constructions get more complicated, you really have to be careful, making sure nothing collapses. Some objects you can use to lean on, but anything purple destroys your hard work, so has to be carefully avoided.
Level design varies, and there are occasional annoying ones, but the majority allow to make elaborate and improbably wobbly constructions, which is really satisfying. It’s a very relaxing game, and really intuitive, give it a go!