I found one cool thing lol try out if your free! heres how to do it : At the main screen you can choose 6 types of snakes, choose one. after that get at least 125 score and kill yourself, then click forward then rewind. ok now your at the main screen again, choose another kind of snake and do it again until you see your snake's head got chopped off
Iff you have trouble finding the easter egg, heres what to do (ONLY FOR FAST CLICKERS) first right click and click play, then wait until the end you will see a picture lol idk what was that, and if your fast enough you may click the picture
 "ULTIMATE ULTRA MEGA DELUXE SNAKE GAME"){kind=icon}
 "The Really Pretty Button"){kind=icon}
 "Slug Designer 2"){kind=icon}
 "cannons mmo"){kind=icon}
 "Stones masters"){kind=icon}
 "Post it Draw it"){kind=icon}
 "Four Second Frenzy"){kind=icon}
 "Four Second Firestorm"){kind=icon}
 "The Primitive"){kind=icon}
 "Jungle Hunt Tower Defence"){kind=icon}
 "Geo Land: The Dream Traveller"){kind=icon}
 "The Button of AWESOMENESS"){kind=icon}