I think it's normal to feel a mixture of anxiety and excitement when posting a game on this site. Don't let the doubts you have stop you from sharing your game with the world. Especially if you're proud of it. You never know, it just might end up being someone's new favourite game or even inspire them to create their own.
It can be scary but you need to push through that fear and share your work if you want to get anywhere. You can do it! :D