I'm a fan of shipping early to get feedback (after my first demo bombed, I quickly produced a second).
But that being said, since it is an "early demo," you should also be clear about what's there - and not there. Tags that aren't (yet) in a game lead to disappointment, as I've noticed, it's safer to stick to tags that are *in* the game, and then update as you release changes.
Custom models are a little rough but if I may suggest, the "show us your daz skill thread," here has a *ton* of solid art, and you'll get a lot of feedback on your models / renders (good / bad / other). If & when you revise them, I'd suggest you post the models there to get a sense of people's taste.
Other stuff: include word count, include render count, be clear about animation / no animation, and give people an expectation for how much play time there is within the first version. Good luck!