Portal in 2D? More like Portal on steroids!
The fact that this kind of games are constantly compared to Portal may be unfair, but it's rather unavoidable, given the presence of a precese of what's basicly 2D version of the portal gun.
As one of four different kinds of portal guns. The most mind bending of these has to be the one that created portals in time, altough the gravity changing one comes as a close second.
All in all, the game is a solid puzzle platformer with a heavy emphasis on puzzles, later of which could take me up to an hour just to solve one. The pixel graphics may be a bit too pixely for some, but overall the presentation holds up, as does the user interface. Mostly. Juggling the extra tools can be a bit of an hassle sometimes and you'll hope there would be an easier way to set the portals up as you reach the point were you're just tweaking your solutions.