YMMV / Fatal Labyrinth

• Demonic Spiders: Wizards. They'll either confuse you or put you to sleep and allow other enemies to home in on you for the kill. Worse, they've got no apparent limit of times they can do this to you, and will often do so right as you recover from the previous spell.
• Goddamned Bats: Literally and figuratively, in the form of Bats, Killer Flys and Clays. It's nearly impossible to outrun the later two, and Clays can steal your food.
• Good Bad Bugs: Finding a pair of Short Bows in one of the earlier stages and equipping them one after the other will roll your AC past 0 all the way to the limit of 99.