You are... the Possesser!. There can be as many as 20 original villagers You have to try and possess 100 villagers/the whole village or they will keep reproducing! But... sometimes they will grow strong and fight back! Arrow keys to move Space to... Possess...! Use fullscreen.
Tips: If the village grows larger, try to find swarms of villagers. Chances are at least one of them is weak. If you repeatedly possess one them, they will grow tired.