while that library does do the job, it should be noted for the sake of pedantry that ATWE doesn't use it. the powering down is handled by "globalStuff.lua" which handles a good deal of the episode-wide mechanics and seems to be an episode-specific library.
the extra player animations are handled by "extendedPlayerStuff.lua" which also seems to either be unreleased or episode-specific.
don't know what the ice flower does cause i never got far enough to see it.
in any case, a library being unreleased isn't an unequivocal "keep out" sign. if you ask mrdoublea he might be willing to give you permission to use them without issue.