You vs. Stupidity 2
This Raisin enemy found in the jungle uses an unnecessary #zap shot after its forcefield trick (:cows). Because of this, his health program skips stages, and if you get him down to 8% and let him put up his forcefield, he will become invincible, rendering the game unwinnable.
Additionally, during the boss fight with Ad Spawn the tiles making up the border of the life bar are composed of fake walls instead of solids, (unlike the other boss fights,) meaning the player could potentially attack the life bar directly. This is blocked by ricochets on every row the player can stand... except for the bottom row, which means the player can shoot the "kill boss" object at any time to end the fight, as early as mere seconds after it begins.
Additionally...
The first hotspot for carving holes into a tree to climb it in the Stale TV Dimension does not lock itself on touch. It can thus be touched in mid-animation to trigger its message and drawing code again, with the result that it will erase an item you need to complete the level. The same problem also affects the second hotspot for making the rope bridge across the river. While this object normally moves too fast to be touched again, it is possible to use pause buffering to run up to the object to freeze it on touch, and then "make a rope bridge" again to trigger its line-drawing code, potentially allowing it to draw the line all the way to the end of the board.
(Report entered by Dr. Dos, original reports by The Green Herring)