Thanks for your interest in 0ad and will to contribute :)
Most of 0ad community is concentrated on the official forums: Wildfiregames.com , so I highly recommend you to also publish your work (including the already released "A Gladiator's Arena") there for increased visibility and better chance of receiving feedback :)
The most suitable place to share maps is the map making subforum: Wildfiregames.com
fcxSanya
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