Got my new Steam Deck recently and decided to give it a spin with this, and it was... fine. It runs well enough on the system and has your classic Portal 2 humor and aesthetics, but it feels kind of lacking in the actual gameplay. The most fun part here was using gyro controls to handle the toilet turret for a few minutes, otherwise the rest of the buttons (including the back buttons of the Steam Deck) are relevant maybe once or twice, and the trackpads + joystick clicks could have been covered more thoroughly. There's a bit too much downtime in this already super short (think: less than an hour, maybe at most half an hour) tech demo, and more recent tech demo games like Astro's Playroom or even Wii Sports just blow this out of the water. It's free so ultimately I can't complain too much, but it really would be interesting to see the first party push their own hardware a little bit more than this.