I have the problem that I can't complete a Deathwish challenge, because one particular Sleepy Racoon enemy won't attack me. That way I can't reach him, so I'm stuck and there is no other geometry around to cheese it.

Restarting the mission in any way doesn't help.

Oh, and in the same level (were you have to defeat 99 enemies), there is on particular platform that I can't jump on without being send to the last safespot. Hat girl seems like floating in the air upon touching the platform. Luckily, you can reach the second one with a triple jump, so no softlock there.

Edit: Never mind, you had to trigger it by jumoing, while being on the upper most platform.