Awesome take of the theme! It reminds me of an old flash game called Karoshi which was based on the same principle, but having multiple characters with different behaviours is a really, really good touch!
The levels were pretty good, that's a lot of content for a 7days jam! The last level was a bit frustrating, maybe the triangles either shouldn't die when touching a wall or don't be so slippery, because that combo made the level horrible to play xD.
Overall that's a really good game. I finished all the levels in 20 minutes and was still eager for more =p! Good job!