My brother and I once had an idea for a 4D game, where you could be chased by NPCs that could move in 4 spatial dimensions. As well as perspectively increasing

My brother and I once had an idea for a 4D game, where you could be chased by NPCs that could move in 4 spatial dimensions. As well as perspectively increasing in size as they came closer to you in 3 dimensions, they would red and blue shift to indicate the 4th dimension.