Hi! This game is SO COOL! Can I ask how did you make those lo fi 3d looks?
A Short Hike has similar graphics, there is a gdc talk about that game on youtube. Basically for A Short Hike they used normal 3d models just with reduced colour palette textures, they render the view to a texture and then apply a post processing shader for colour grading to further reduce/fix the colour palette and the post processing shader. I think the pixelisation might just be rendering to a really downsized texture and then stretching and drawing that to the real screen?