Enemies
There are many different enemies to defend against in Small People Defense. Enemies are spawned with a new wave every 30 seconds, or 6 seconds if rushed by the player. Their stats are dependent on the number of enemies spawned and based on how much money the player could have earned over the course of the level.
Serfs
Serfs are spawned every 3 seconds. Rushing does not influence the spawn rate of serfs. In endless mode, serfs are promoted to super serfs after wave 100. This is only a visual aspect to the game.