chronotron
Chronotron is a surprisingly clever puzzle, that uses time (or more specifically your actions in time) as a gameplay device. The game’s creator describes the game:
It’s about a robot that goes back in time for some reason. (His best friend is a talking pie!) Use your time machine to interact with past versions of yourself in this puzzle/platformer!
Despite the annoying music and Flash graphics, the use of interaction with “past versions of yourself” to solve puzzles is really tricky, and can even cause time paradoxes. I’ve never seen a casual game’s puzzles built off of a time dynamic like this. It’s so simple, clever, and innovative that I wonder why it hasn’t been done more before.
