I'm glad you like it :)
I'll do what I can to improve it!
I'm not really sure when exactly the second demo will be out. But when I do I'll update the game page.
The price was 3 dollars (at first), which was reasonable for a low poly niche game like this one. But now that I am upgrading the quality of the graphics, I'm thinking of raising the price to 10 dollars maximum. Again I'll update the game page when my decision is final.