Mono Trail is a casual Eulerian puzzle game. You could relax with the Mono Trail.
You could solve the Eulerian circuit problem with delicate real-time control. (Use your →←↑↓ arrow keys!)
You should be careful, or you could lose your chance to clear the game.
It's so easy to play, hard to conquer.
There are from easy maps to hard-core maps, and you can easily make your unique map by the built-in map-maker.