Black and White Knight, Alternate Game Idea

Whilst working on my 'Stained Glass' game concepts I came up with an interesting alternative to my idea. Experimenting with my base mesh and the ink and paint render I came up with the idea of a kind of 'Two-Face' knight, one where the player can choose their own light or dark path. The game would be a 2.5D side scrolling platformer when the player changes their direction of movement the whole world changes in a Zeldaesque light/dark world mechanic, little bunnies would become raging worgens and friendly villagers, horrific demons. The art style would be akin to that of Limbo but with a Celtic design to the environment and assets.