Syobon Action Ultimate is currently available for as a "name your own price" download on Itch.io. While it launched with a set of levels including "Magic Dungeon" and custom stages, it remains a living project intended to host future updates like boss battles and RPG-style modes. Syobon Action Ultimate by Progrstick - Itch.io
Unlike older versions that might feel clunky on modern hardware, this version is built in syobon action ultimate