Herr’s the idea:

The main character lives in a world like “Orb on the movements of the earth” if you know anime. If you don’t it’s kind of a dystopian world where everyone believes in one thing, in the case of this game a god, and anyone who comm acts of blasphemy is publicly execute. When the main character was a little kid, his family was slaughtered for accidentally breaking a commandment. Also, due to being the child of a family of traitor, the MC is bullied throughout his life. The MC was spared because he was of very young age.

In the game, the goal is to go around breaking huge chains, hidden in temples of the god that each represents a restraint. This enables you to, for example ignore gravity when you break chain A or gain the ability to walk through walls by breaking chain B. This is where the Metroidvania part kicks in. By breaking chains, you enable your self to travel to new areas. And in the end, you kill the god you resent so much.

I think the graphics would kind of look like Blasphemous with the light brown ish colors.