itch.io

Yes, if you bought it on Itch.io then it will be linked to your account. In the top right, click the drop down arrow next to your username and then go to "My Library". There should be the game listed and a download button you can press.

To get to Hinata's Hatred scene, get dominant and hatred up high, and then work out to get your strength up. Keep working out and you'll eventually get to a scene where you overpower her