Got it running on Linux to give it a try. The only issue I ran into was the end-screen menu not responding.
I'm guessing the 3-item limit and pick-up timer were meant to balance the smaller map, but I'd love to see more "natural" mechanics down the line, like heavy items actually slowing you down and have more movement speed outside of it.
But all in all, its pretty cool concept. I can see the potential.
P.S. I think it will be hilarious if you could steal everything. Just take the tables and chairs with you :)