The Bat is a small, crudely-drawn bat thing that will fly towards the player in an up and down wave pattern, much like the Drone. When a Bat touches the player, the Bat will quickly drain the player’s health.
Bats always come in large groups, making them very deadly if they manage to reach the player.
The Bat is very weak, health-wise, but their attack will quickly drain the player’s health, making them quite deadly. Their speed isn’t the greatest, making it easy to safely take them out from a distance.
Any weapon except the Tazer will decimate a Bat or a group of Bats in no time.
There doesn’t seem to be any enemies that directly correspond to the Bat in the final game.