It’s a cool concept, and it’s even visually kind of interesting, but it could use some polishing.
The game feel and mechanics could use some work, the train is kind of hard to control regardless of whether the player has a lot of cargo or very little, and it’s hard to pick the train cars up, they tend to just kind of bounce off. It’s also really hard to tell if you’ve managed to pick something up or not once the train is longer than a dozen cars or so because they go off screen.
In terms of graphics, there are some jaggies that I found distracting, so I guess it could use some kind of anti-aliasing to look more appealing. I really like the concept though and I’m a fan of these kinds of resource collecting games, and would like to see some more depth added to this on improving the looks and mechanics, and then it would be hard to pass up.