So I've been digging through this classic Williams Arcade game ported to the NES which so far has been going well :)
Figured I'd share what I've learned so far about the games workings...
Every time you fire the blaster or use the star gate the mutants on the stage shift horizontal position over top of another settler then continue to descend towards them.
Your ship is on roller skates and accelerates decently fast. To slow down for an enemy I've either had to start coasting super early or turn the ship the other way and accelerate. Also, it is useful to turn backwards while coasting the direction you were going to blast an enemy.
Useful address that I've found so far
$00F1 - Blaster fired
$033C - Smart Bomb count
$005E - Current wave
If the manual for the ATARI correct there is 100 waves total. Jumping the wave number up in the NES version I can tell that there is at least a wave 1-10 then it goes A-Z after that I'm not sure what happens, I'm trying to shoot for the Kill Screen as it is right now honestly not sure there is one to hit.
"Do not meddle in the affairs of Dragons, for you are crunchy and taste good with ketchup!"