OLD pc zombie game with little man with a big head and a hammer?

hi a thew years back i was obsessed with a pc zombie/halloween game i think it was 2d your character was a little man with a re hammer and you could get more hammers by useing a cheat hammersplease there were several bosses one with four giant zombies and you woke them up one with giant spiders one in a dark room with i giant skull with a white laser coming out of his mouth the end boss was a big green tentacle thing on lava that fired lava balls at you you had to kill the legs then go for the head it wasn't all bosses their were little zombies and spiders and bats and even pumpkins when you start off i thing you enter each level through grave stones i hope this is enough i would love to play this again