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.
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.
