And my reasons for saying this is because to ME, this is more than just a MINIS "device". Sure at first glance you might conclude that it's for minis... But if the "device" were in a world where minis are NOT part of the culture... It would be more about a question of "3D GAMES"!
The Game Crafter community is LARGE and with a TON of designers. I've seen some TGC contests and let me tell you their ideas are real cool ... They've done over a dozen contests over the years and I'm sure they might be interested in something NOVEL.
Like I said, it could be played on a normal surface or the ENHANCE 3D "device" would take the experience to a whole new level. Why I say this is because to DESIGN a game for the "device" WITHOUT having one of them ... is a bit "troubling". The "device" would make 3D playing more natural.
Anyhow that's my personal opinion... BGG is good too... But they won't "advertise" your contest. They may list it ... But people will have to find it on their own. In the case of TGC, they will put it up on Social Media (like Facebook, Twitter) and send a newsletter to all their designers, etc. If you don't have the marketing power... TGC does.
Enough said... I have spoken my peace!
This is an add on; an extension for existing games, all you need is your miniatures, some scenery and your imagination - that's it, no batteries, no internet, no rules and no tools; plug and play!!