Mouse & Cheese & fun

In order to find delicious cheese, an adorkable mouse launched its final plan. In this game, the little mouse can only move toward the sides, or up, or down. And it would slide constantly in one direction only, unless it encounters obstacles. It would be a big test indeed on the player’s path planning capacity, if he wants to find the optimal path through changing the directions.
Game rules: Only when the players help the mouse "eat" the "cheese", can the entrance to the cave appear. And after that appearance, the player has to plan a path to help the mouse get through the entrance to the cave. And the successful path planning means the success in breaking through the stage.