It's intentional that you can't rollback in Cowgirl Casino 2. The game didn't quite work right with rollback on, I kept hitting weird isshes when debugging.
I will definitely release all future games to include an APK, and be web-based if I can. I wanted Neon Dreams to be browser-playable, but since I made it fully voiced, it's too big to play in a browser.
There's no plans for a Cowgirl Casino 3 at this time. The girls are pretty dang big, it's hard to make sprites that large with that art style. If I were to do a CC3, it would likely be in a different style or engine than CC1 and 2.