It's me, @llamaguy. Press space to laser. I haven't played the Astro Bot games (I don't have a PlayStation lol) so I had to look up gameplay on YouTube. I made the speed and acceleration changeable in case you don't like how it is right now, since I don't know how the laser controls in the actual games.
I originally made the laser using pen (which would have been great, since it didn't use clones), but pen always shows behind sprites, so the laser wouldn't show up in front of the Background sprite unfortunately. Also, remember to set the "zoom" variable to 1! This will fix the problem you had with the enemies being too small to see.