Thanks for playing! From your description of the Halloween level, it sounds like you played the Alpha demo. If you're interested, the Beta playtest has missions so running in a circle as Peppermint will no longer be sufficient to complete the game 😀
There are also many more animal-themed skills!
You can give it a try by clicking "Request Access" on the Steam page, and that should give you access immediately to download and play the Beta Playtest.