Hi Amos,
I'm just about to return to it. I got a little sidetracked with the physics. I wanted to make sure I got my head around them, as I was trying to figure out whether I should use physics in the 'Invaders' game or not. The concrete answer is NO, 'but', hehe. I think there might be a case to do something with it.
So, expect the next article over the weekend! My last post was on the 'colour changing' of the players ship and alien.
I now want to introduce the GUI and then the Waves of ships; to make it playable!