The New Game of Death (1975)

A Bruce Lee lookalike his hired to finish the movie left unfinished by the untimely death of the King-of Kung-Fu, concerning a young man unwittingly wrapped up in a money scam. When he refuses to give the cash back, the bad guys kidnap his girlfriend and hold her hostage in the Tower Of Death. Once there, he is given two options. Watch his girlfriend get thrown off the top or fight various martial artists on 7 different levels to win his girlfriend back.