On the Atari 2600 version. Only the ones below shooting. Get boring after 2 stages because the rest isn't shooting. This is like a kid mode. lol
They can respawn back to life on the higher levels.
The little ones shooting for a short time and then following your ship when they're going down. Little ones doesn't respawn back after touch the bottom of the screen. You have to try to stay away from the ones that are coming down.
Your ship can get frozen yellow for a short time. Turn back to normal after that.
Your game is much better. Everything that I said is from the Atari 2600. Above.