Blender Game Engine

 you might didn't notice that there is one in blender.
so, take a look and go try it your self!

 delete th Cube, Make a "plane"

 how to make the movement and the player.

make the borders, and other objects if you want to do that.

 now, you are finished. Press "p" to start the game,
___           _____         ______________
|       |         |         |         |                                |
|       |____|         |         |           _________|
|                           |         |          |____
|        ____          |         |                    |
|       |         |         |         |           ____|
|       |         |         |         |          | 
|___|         |____| ave |____| un doing this!