You click the pumpkin to get "scary points", these points will allow you to buy auto-clickers, to do the job for you. You can get better and better clickers the more points you get, just like a regular clicker game, but you know why this is not just like any other clicker game? because it has tricks and treats! Also, you can hover over a clicker or just a square with a picture in it in the shop, and if you click it, if you have enough points for it. You will be able to buy it, and use up and down arrow keys to move in shop.
LDM means: low-detail-mode, turning it on makes it so that there's not that falling-pumpkin on the screen every time someone clicks the pumpkin. Because if you have a lot of clickers, then it can get quite laggy. And when ever you buy a clicker in ldm off. It just creates a clone of the clicker, but that makes a lot of lag. So I just used a variable to stop it from cloning and still work in ldm!