itch.io

Yes, the game hasn't been updated for about five years. However, you can check the official Discord because a big update is coming in the future. Good things take time.
You can also check the Patreon page for updates on the game, as user dfgfdgfdfgdfgdfg mentioned. Hope this helps.

the thing is their actually have chaos mode

I agree with Matsumatsurika

are you sure you click exact this grey little circle on top left corner?

I went through try to unlock the sandbox mode, when I got it I am little bit disappointed. I want in Sandbox mode can select and choose the event that want to happen. Pls make this thing happen.

Sorry but Touhou is not anime it is bullet hell game 😭

This game is so cool and fun, but also hard af