Note: I have also played the demo.
Looks nice, a cute game, but fundamental controls are really awkward. No buttons to change the height of what you're placing, very often unable to click the side of something to place something the same height... it's quite overwhelming with choices, not intuitive and slow, and takes way too long before you actually have a decent train track. And sometimes placement acts bizarrely, like I placed a wood bridge in a diagonal grid space from another, and it rotated the other - they aren't connecting so it doesn't make sense.

If you have lots of patience, then you'll probably enjoy this, but it's not for me, without lots more QOL.

It's a neat game but it's janky as hell. The toolbar takes up a full third of the screen and it can't be minimized or scaled down. Speaking of scale, it's not consistent at all. Some things that should be small are really big and things that should be big are too small.

The trains are cool but the routing is simple to the point of useless unless you plan to watch them constantly and manually throw switches to prevent them from colliding.

Game could also use more assets. LOTS more assets. More colors. More model variations. Wildlife.... Random weather.... Oh, and the zoom sucks. It only zooms out about half as much as it should.

Well, it's $6, so okay, just don't expect to be wowed.