Lagrange L-2 is a fairly short (if you know what you're doing!) graphic adventure game. You have to work your way through a variety of puzzles, the most nerve-wracking of which is probably the first one, as your energy depletes at breakneck speeds and you have to figure out how to make that stop. I checked someone's playthrough on YouTube, it was something like 10 minutes. It's graphically appealing, containing a variety of unique scenes.