Baba is Constant: Baba is You Modded Levelpack

This levelpack is a proof of concept for new modded word- CONSTANT. For those who don't care about figuring out what the property does yourself by playing the levels, below is an overview of the word:

Brief explanation of CONSTANT (expand to read)

This mod manipulates the undo mechanics of the game. Objects that are constant become unaffected by the effects of undoing.

This levelpack isn't very fleshed out, but I decided to just make 5 levels for now to cover a few  interesting uses of the mechanic I see so far. However, the way the mod is implemented can be a bit un-intuitive if placed in certain situations, so if there's any more advanced modders out there who can figure out how to implement this idea better,  free feel to do it.

(im not much of a coder, this mod only uses 4 lines of code okay not anymore)