The original motivation for writing this was to do the -- relatively simple task -- of letting someone add their name to a high-score list at the end of a game, without having to switch to console mode. It turned out a little harder and more involved than I expected ... So, attached is another class (with little demo program) you might find ...

Indeed very clever!  Thanks for a great example, Neil!

This short program demonstrates how sprites can be used to create fading text.

The classic 2-player game of Checkers.  Uses Drag and Drop style of mouse input for moving the checkers.

In thinking about what I might try next in Phrogram, I started to look at doing some kind of "Worms" or "Lemmings" style of game. I then ran into a problem? How can you shoot a hole in a sprite, or dig a tunnel through one? It took me quite a while to figure out how to do this -- and at first I thought it wouldn't be ...

Here's a quick example based on LearningProgram004, Joyce.  Basically, I added a second UFO to the program, move them both, and when they collide I make one of them disappear and the other one grow in size.It sounds like a very fun game - glad to help more as you work on it!

Here you go, Wolf - the zip file linked above should have a running version of your program in it.  I'll also paste it below.  The main thing you needed was a "while" loop which keeps running, watching for keys over and over again, and moving the tanker when a key has been pressed.  Try it out, then ask some questions, ...