I like to pat myself on the back when I see first-person puzzle games, because when I originally played Portal I immediately said something like "well there's a new genre", and lo, so it came to pass. Well done, me. (I suppose you didn't need to be Sherlock Holmes to call that one.) Anyway. Here's another instance of that particular genre, this time called TesserAct. The team, Propelled Bird, explain: "Waking up in a strange facility, college student Sam takes control of a device called the Catalyst; a device that manipulates space-time and alters physics. Inspired by the critically acclaimed "Portal," players will use the Catalyst to change the laws of physics with whatever they happen to fire upon. Players will walk on water, create floating stepping stones, and much more!"
It looks okay, below.