One Button Games 5-in-1

I found this to be one of the more difficult achievements in the game. There are no single lines of 10 enemies (the most I found was 8), but I managed to get it by waiting for lots of enemies to come onto the screen (which can take a bit of time), then I cleared a line of 8 which happened to be overlapping with a 2 other enemies, giving me a combo of 10.