Nice...just a little to simple
Choo Choo, like a train, a very nice name for quirky puzzle game, very simple and straight forward. Gripping at first but I did lose interest on later levels. It needed a few more concepts
Some suggestions
Goal holes with different colours
Painter gates that paint a new colour on the snake as it passes
Colour switches that when hit with a matching snake adds a new section of the level
Teleport gate that will make a snake ride though into another part of the level