When NG Studio commissioned me they explained that their UI did not match the style of the game, and they wanted to change that. So my first step was to talk in depth with the team about the game and its identity.
The story of Echoes from the Soul has a subtext of fighting inner demons. Throughout the game the outside world reflects the main character's inner world: they fight literal demons that represent past traumas, insecurities and fears. Because of that, the game has a strong mirror motif (especially broken ones, that represent the bad mental state of the character), one of the levels is even set in a house of mirrors. With that in mind, I decided to design the interface taking inspiration from mirror shards.