[marked]

The brick texture 0256 looks good but needs some touch-up. When it tiles together for a large wall area it gets a "wavey" look to it. You can see it in the first level on the wall with the tunnel in it. Its probably just adjusting the spacing on 1 or 2 of the bricks to fix it. Other than that, the texture of the bricks looks good.

And the headlight for the train looks a little plain. Possibly make a circular bracket or holder around the edge? I threw something together real quick just to show what I mean. Those tabs may not look right but just something on the outside so it doesn't look like the bulb is just floating in front of the panel on the train. Maybe a shroud cover?