how should I make it easier, other than lowering the amount of enemies? Like, should I slow them down, make their bullets not travel as far etc...[/quote:1m86605c]
Those are both good ideas. Any way you can gradually ramp the difficulty up is good.
I also seem to recall that the original Robotron had walls in a few of the levels. Not like a full-on Pac Man maze, but just a couple strategically placed ones.
Nope, I was wrong. I was thinking of Berzerk. Which is kinda like Robotron with walls.