These enemies are very annoying. They have infinite range, meaning you can't outrange them in any way. What's very bad about them it their attack; it releases a spinning laser that moves extremely slowly. Each frame, the laser releases some heat that lasts for very long times. The laser itself is very dangerous, while the heat drops deal low damage, but there might be 5 in the same spot when you espected only 1 to be there! Fortunately, the Brown Jelly Germs have extremely high AGI.
Brown Jelly Germ