A free program for Android, by Debbie Shine.
This is an application for users to play the game snake eat apple, which is a classic logic puzzle game. The objective of the game is to get to the other side of the level. To do this, you need to find the path that will take you there, and do it in the least amount of moves.
You need to eat apples and other fruits to grow and evolve. You also need to avoid obstacles and get out of the way of the oncoming trains.
If you find that you are getting tired, you can rest for a while, and then continue to the next level.