To implement Maze game in Scratch a step wise procedure is as follows:
1. Click on new sprite option and add one sprite butterfly
2. Second sprite will be default one that is cat or user can change it too.
3. Click on the new backdrop option and add a maze backdrop.
After these three steps interface will look like this.
4. select butterfly sprite and write the following script.
5. select cat sprite and write the following script.
6. . Click the green flag to run the game.
A pdf of the given tutorial is here. Maze Game