There were a couple of laughs to be had in this film, but some were laughs at the film not with it. This sort of "what if" collection can work but it didn't work too well here due to the jokes not being great and the performers dont have much natural talent. Little to no effort was put into the Neolithic setting, park benches etc were clearly visible in the background. This definitely was one of those films that looked like you guys had fun making.
Oh and the blood on the leads hand (blood acquired during a "what if" sequence) was still there when it shouldn't have been and his hand was really obvious in that selfie shot, wash your hands young man!