It does have a nice retro alien game sound to it. I can picture this being a good soundtrack to a hop and bop platformer type game.
Like MysteriousPresence said, it does need more melodies to it. The song gets very monotonous. I also agree that it took way too long for a good melody to build up.
I think you just need to get comfortable experimenting with a bunch of different sounds for one song. it seems like your biggest issue with making songs is making sure that they don't get so repetitive.
Just keep on improving!