Thanks! We spend a lot of time of the art, music and puzzels, but got in a time squize with integration. 😅
The 2.5d effect is made by using a 3d scene with a 'normal' 2d groud texture. Everyone you can walk around is just a 2d Sprite standing upright with an offset of 20 degrees to let it point to the camera. For the Shadows we added a sphere to every object that only casts Shadows.