This game on this site is exactly the same as the one sold on DLsite. On this site, it’s priced about 30% cheaper than on the Japanese site. That said, since it was a game I put a lot of effort into making, I honestly feel I may have made it too cheap. Four dollars is cheaper than a burger set in the U.S., isn’t it?
However, it was my first game, and the artwork is honestly rather rough compared to my current work, so I decided to price it boldly low. The DLsite version also includes the English version, so there’s really no particular reason for you to buy it there. If you can use PayPal, this site is more than two dollars cheaper.
As for the amount of transformation content, I don’t think it’s small at all.