Lunar lander revisited

Liberty BASIC comes with a nice introduction to video games called lander.bas.

• It's a good example of a timer driven game.
• It uses sprites which are actually generated on the fly using turtle graphics.
• It also shows proper technique of structured programming.

So I have some ideas that I am thinking about implementing to update it and make it an even more complete video game example:

• Add sound effects including ambient sounds, rocket motor noise and crash explosion.
• Animate the rocket motor so you can see rocket exhaust coming out.
• Add some flying space junk sprites that you need to avoid while trying to land.
• Add a colored starfield in the background.

Looking forward to this!  Check back for updates!