OfficeSCAPE is a speeding running type first person platformer with physics based puzzles. (For lack of comparison, as i'm not really familiar on what's out there in regards to games like this in the genre, think a light version of Super CloudBuilt or SEUM Speedrunners from Hell) It's free to play on steam features nine independent levels, and I found it hunting for FPS adventure puzzle games. Knowing it as short and seeing it was free, I was game. The box gun fires and creates boxes you can stack and do different things with

Each level typically introduces you to new tools and puzzle-solving mechanics, or physics based obstacles. All in all, these puzzles are good if not great... The trouble is the physics is wonky. It's super slippy and slidy. the player has a kind of exaggerated momentum and movement can be cumbersome (but that can also make it all the more fun to fly around the place once you get the rock propelled grappling hook)

I like the tone, the colors and the look. I just found the physics a bit problematic towards the end (oh and the last level is next to impossible, and is essentially an ultimate challenge where you must do all sorts of things in one single run... ain't nobody got time for that)

If you're looking for something quick, free, and similar to Portal, Q.U.B.E. albeit with a weird physics bent to it, I would recommend. This dev has a good head for puzzles, and came up with some imaginative concepts (I loved the pachinko box puzzle)