I'm not the one who made the game but....yep, the game is still in development. According to a post by the developer about the roadmap, there are currently 4 locations under development:
The Dungeon for the Capital
The Desert
The Dungeon for the Desert
Demon Queens Castle
There will also be new updates that add content to characters already in the game. It's all free but if you want you can support him via patreon.