These are the new questions. No more answers for the old ones will be accepted.
New questions:
1. What kind of weapon can turn horizontal springs around?
2. What item in the Psych tileset are you most likely to get stuck in?
3. What can you not do while confused by a smoke ring?
4. What two items are found behind some of the rocks in the Jungle levels? (Some rocks have none, some have the first item, some have the second.)
5. If you shoot a tree that is in midair, what does it do?
6. What non-custom level features a spring with a Generator?
7. What does a spring with a generator do?
8. Which level difficulty (Easy, Medium, or Hard) requires you to play an extra level if play single player from start to finish?
9. What tileset (if the answer was Moo then Moo 1, Moo, Moo Night, and Moo 2 would all be acceptable) is used by the only JJ2 single player level to contain a secret or bonus level?
10. What is the "third" list server that is contacted for some reason regardless of what you have in Regedit?
11. What does shooting ice ammo at TNT do?
12. How do you make ceiling spikes?
13. What enemies have two stages (for instance, you shoot one and it turns into another.) not including bosses?
14. Which boss only has one frame of animation?
15. What was Jazz Jackrabbit originally named and what was his occupation?