Hey TrueMOD :)
Free version is heavier since it embeds all of the files but with additionnal scanlines. This is to show the full content at 0 cost.
There are no animals yet but it's on my todo list. If you have still some interest for the package rn, I can send you a dl key (mail me a pixelart<dot>asset<at>gmail<dot>com)
Have a good day !