Thats true....
it does lag up and gets all slow if you add sound because it adds a shit load to file size so it makes it slower and if you have a slow computer... DAMN! you be waiting for it to load and stuff for like 4 months!
so shut up and there is good enough sound the background music is best choice because its a like.... Speed game to shoot the aliens and if you rigth click you can get music and qaulity controls....
The best music is probably number 2
so yeah... sorry for long review but ok...
-Justin :)
voted 3 because it was good but the art kinda stinks but who cares i still liked it :D