The button option is... interesting. I'll much rather it be Space for Jump than J. Same with the Inventory part being K and having to use A & D to switch, got me in scenarios where I fumbled my buttons and lost.
The Difficulty is interesting, some parts are easy, some not so much. The Dungeon Second Room with the Yellow haired ladies lags the hell out of my game for some reason, and the Ending where I'm out also lags a lot. Btw, some of the girls you can escape in the gallery, while some you can't.
But for a free version? Pretty good. I just wish the save zones were in better areas (especially for the final boss fight)