Nintendo eShop has Railbound (Nintendo Switch Digital Download) on sale for $2.59.

Product Details:

• Single Player
• Genre: Puzzle / Boardgame / Lifestyle / Strategy
• Railbound is a comfy, track-bending puzzle game about a pair of dogs on a train journey around the world.
• Connect and sever railways across different landscapes and help everyone
  reach their homes. Solve over 150 clever puzzles ranging from gentle
  slopes to twisted passageways.
• You will earn up to 13 eShop Gold Points on this purchase (learn more).