Bats are enemies in Babel no Tou.
Bats occupy a couple of the floors, enjoying the dark lighting. The bats in the Tower of Babel have a very simple a predictable pattern of behavior: They bounce up and down while moving to the left or to the right until they hit some obstacle, at which point they reverse direction. By carrying a block over Indy's head, it is nearly impossible for a bat to land on Indy, but it can still happen if Indy is standing in the wrong place. One touch of a Bat is lethal to Indy. Bats can be squashed by blocks, and the do not return.