This game is a python based clone of the retro game lander.
To play this game, you could download this file (you may need to click on "View Raw").

The aim of the game is to land the lunarmodule as often on the moon, as you can.
Use ArrowLeft or ArrowRight to rotate the lunarmodule.
Be aware it can only land upwards on the moon. Otherwise it will be destroyed.
Use Spacebar to activate the thrust of the lunarmodule for navigation and slowing down
its landing speed on the moonsurface. It can only land with a velocity less than 6 meters per second. Otherwise it will be destroyed. The amount of fuel you got for landing is limited.
Use it with whisdom. If you hit any of the boulders on the moon the lunarmodule will be destroyed.

For further information visit the wiki.