Could it be possible to make the "stop enemy" (or how is it called) work again? (it worked in the 1.22 than it stopped worked in 1.23. That's a strange thing, that levels maded with 1.22's JCS, are still works with stop enemy in 1.23... )
Fixing the wall stuck would be great, that's one of the main bugs in jj2.
And maybe that would be harder, but if it's possible, it could be nice, to fix the episode menu not crashing when you have too much episodes.