https://store.steampowered.com/app/1767700/
or just gaze upon it on itch.io (they don't have wishlisting)
Costume Party is back! With a new name, and a bunch of cool new features. Save and share levels both offline and online, enjoy new abilities for many of the characters, and deal with over a dozen new tiles and monsters that interact in a bunch of wacky new ways.
Kid Hallow includes the original Costume Party as well as the Winter Pack, Dumb Pack, and Fantasy Pack DLC.