What should the set be named?
I personally think "Chip's Challenge Level Pack Alpha" could work.
How many levels?
Allow levels with CC1 boot rules?
Consistent viewport size (9x9 or 10x10)?
Map size limit? Namely, should the 40x40 limit from the CC2 main game be retained?
I don't think a limit is necessary, especially if a lot of the space is used for logic mechanisms.
Should any tiles or techniques be banned?
I like the blank "no" signs. I am not exactly sure what the zero-directional blocks would be used for though. It's probably best if the set isn't glitch reliant. I could support block slapping being utilized if the technique can be introduced.