In the junkyard area, after you give the dog fish a bone, you are allowed to go inside a purple car to retrieve a speedometer. The car may be a gruesome nod to Putt-Putt. Other than having a roof, the run down car shares many similarities with Putt-Putt, such as similar designs, color, and even a similar looking dashboard that's inside. The Putt-Putt series was also made by Humongous Entertainment.
If you add the line "EddieEatsLuther=1" to the hegames.ini file and click on Luther after meeting Eddie the Eel, Freddi will feed Luther to Eddie.