This game is a fantastic example of experimental gaming in a easy to pick up form. I have not played the steam version but based on my experience with the old version, I could not recommend this game more highly for gamers looking for something different. Without spoilers, if you liked Braid, you'll like this a lot.
The game isn't very long but it is well worth the price and every second of gameplay. Also consider VVVVVV, another incredible retro-style experimental game.