Did you like Snake Slider? How about Wriggle? Or TRUpuzzlE? These are all classified as shunting puzzles.
Choo Choo Puzzles are essentially the same thing. Except it's played on a hexagonal grid. What's different? The Choo Choo Trains cannot make sharp turns.
There are 24 levels - I solved them all in about 1 hour. I think I'd like to see this turned into an app; it's a bit awkward manipulating the trains with a mouse.