A really fun mechanic to play with! I'd love to see this developed with predetermined levels and puzzles and whatnot. My fave entry I've played so far!
A downloadable game
There is no clear path to victory, luckily, you can create one.
Shift your environment to clear a path to the portals, touch them to destroy them.
Careful though, you have no weapon, and must avoid those creatures coming out of them.