Smudged Cat Games now offers a playable demo for Gateways, a 2D platformer game making its way to Xbox LIVE Arcade as well as Windows on June 22nd. Here's a bit on the game: "Alongside the traditional platform elements such as jumping on enemies heads, spikes and moving platforms are the gateway guns. The gateway guns allow you to place two gateways on the walls, floors and ceilings of the lab so that when you pass through one you emerge out of the other. As progress is made through the game different types of gateway gun are introduced with different effects."