Generally like the look and layout of the map so far. Had some lower player count playtests, blue ended up winning both times, no solid feedback on that front yet.
I do want to say that the cart gimmick is neat but less of a real factor than I had hoped. It's pretty easy for RED to sticky trap BLU spawn and destroy anything made during setup. While it's possible for counterplay here, it's pretty unreasonable to expect it from BLU. Past setup, it's also unlikely for much to get built on the cart except mini-sentries, which again, neat, but not a great tactic and not one that ended up being too different from placing minis around the cart.
What I would really like to see is more incentive to building on the cart, personally. I will idly wonder out loud whether it's possible to instant-deploy buildings on top of the cart, a la how it works in MVM? Something like that would be exciting.