I had the chance to see a lot of games of Day 1. Here are some recommendations that will help people to choose your game

Before zip Rename your folder project to the game name

If you are use Unity delete the Library folder for reduced file sizes

Include a OpenGL build on the submission page, so people can give feedback easily. If you are not targeting for OpenGL please provide more details about your game (images, videos, text)

If you are using assets from other people give the credit