Möbius

Don't be mistaken by the plot-driven intro. This is actually a one-room, one-puzzle game.
The actual puzzle is quite original and well implemented, (Spoiler - click to show)based on a time machine, repetition, and multiple copies of yourself.

The parser is perfect, the writing is clear, and the game is short and fun (IF you like puzzles).

Only three stars for me tough because at times I found it frustrating, and the 'time limit' is really unforgiving, even if you can't really die. When I had already an idea of how to solve it i just checked the walkthrough.