The opening musical sequence has some scenes of slapstick content.
Throughout the cartoon, Hercules fights several creatures, and eventually kills a few of them. Only during a musical scene, he is briefly seen going to fight some opposing men. These scenes are very mild.
Alcmena gets run over by a chariot, off-screen, while rescuing Hercules. We immediately learn that she's been killed.
Hera makes several but mild references to have Hercules dead.