As you automatically move from left to right enemies come barreling in from the right side of the screen, with you moving between three lanes to avoid and / or take them out. (attackofthefanboy.com)
«We've made the right enemies,» Cantor says. (nymag.com)
Accordingly, we have weaker troops and in a sense dumber troops that often do not fight the right enemy. (cavemandoctor.com)