Thanks for the input logbomb, I've actually tried to add the WBIML/Monster World 1 sprite before and it works with some modifications (it's a bit too wide and tall in original form), but there were some issues with the animation because of the limited sprite tileset. I'll look into it for a future version though. The WB3 sprite is too big unfortunately, but with some editing I could make the other one resemble it more.
Huh. Personally I would have nothing against him/them selling mine unchanged and just giving credit as I just want more people to play it, but the changes are mostly for the worse, and I couldn't see an attempt to give credit anywhere so those two are bugging me.
Latest updates: -Tweaked a few things to make some levels flow better -Fixed a couple of cheap shot situations (most notably in level 0E/Kingdom of Nibana) -Money and item blocks in castles no longer respawn when re-entering the rooms they're in (this was a bug in earlier versions of KiddEd)