You are allowed post about your game in the "Show off your project" forum. The post should link to where your game can be downloaded or hosted (itch.io, steam, dropbox, etc.) but there is not a good way to have the downloadable package attached to your forum post. 

If you are asking about making an art submission, then you may share the game's assets as an art submission, and you may include a playable game along with that submission, but the downloadable package should be arranged such that the focus is on the game assets and making those assets reusable and easy to access. The playable game component should be secondary to that.

Submitting just the game without any openly-sharable and reusable game assets is not allowed.

I´m sorry for hijacking this thread, but i´ve got a related question, i guess.

I´ve made a little "software"(it´s made with another software called Visionaire Studio).

With this software you can quickly make Lucasarts style point and click characters, so

it would be 2D art. Am i allowed to upload it here? I mean, it´s software, but it´s to make

assets, so i´m unsure about it.

Thanks in advance for an answer.

@CrazyDuckGames: Same answer as above; you may make a post discussing the software, and include a link to the software, but the software itself is not an art asset, and should not be submitted as such.

You may submit the art assets that you produced with the software and, again, link to the software in the submission description, but it is the output of the software that are 2D art assets, not the software itself.