Are homebrew developers allowed to submit assets of their games?

[Petie]

My understanding aligns with puggsoy's. If it's a passion project that you and a few friends know about and you've made either entirely custom work or significant edits, you an submit them to the customs section. If the game has received any sort of notable release (i.e. it actually has some sort of following), you can submit it as a standalone game. Someone more familiar with the submission process is welcome to chime in as well though.