What's the alien's name? I might have just spaced out or accidentally tapped past it but I don't think it's ever said in either game what the name of the green one is.
Maybe you could try adding a comment/forum to Spacethumper 2 to get basically a survey from the audience if there is a name they would prefer? All of the dialogue in the current games would still work since the name is never mentioned but it would probably make writing dialogue easier going forward.