Hey!
We don't have any immediate plans for new content - we've been adding things since the initial itch version launched a couple of years ago so the game has a pretty substantial amount of stuff in it already. It's already way bigger than we initially envisioned. That said, we keep getting new ideas and get excited when we get feedback from players so you never know :)
We will absolutely keep supporting the game with bug fixes and balance changes, and we're also looking at things like achievements for the Steam version. We also have some ideas for new games that we will hopefully get started with soon!
Thanks for the question and hope you have fun with the game!