As far as I know no one involved in Lightmatter worked on Portal or Portal 2, yet this game really wants players to remember portal.
2 achievements are portal references, a portal turret and cube are in game, and the facility's leader talks about Cave Johnson and Aperture Science constantly. It's a shame because the gameplay is pretty good and the game should stand on its own.
I'd recommend it for a short puzzle game. Spent 2.5 hours with it and outside of the Portal references and bland story I don't have any complaints. Visuals are great and the shadows do a cool shader effect I hadn't thought about before. 7/10