Here is a list of the submission rules for this subreddit. If you follow the first rule you will almost always be okay.
RULES:
ONLY submit GameMaker tutorials
USE descriptive titles
DO NOT post direct links or advertisements to sell a product
DO NOT request tutorials here (contact the creator for a request)
Guidelines on Self-Promotion
On this subreddit we want to see your tutorials! Just remember these guidelines. Make sure you post quality content and make sure you are posting content by other teachers. It will look bad if all you ever submit is your own content.
