"Hill Billy equips you with a handful of guns and gadgets. In each of the five levels, your objective lies in killing enemies before they have the chance to grab carrots situated throughout the environment.
The game's first level starts at your carrot farm, the orange roots nestled on easily defended plots. Enemies warp to your farm in waves, the level ending when you're successfully defended against every wave. Each level plays out in a similar fashion from farm to greenhouse and beyond, stages concluding when you've cleared every wave or room of extraterrestrial foes."