I haven't had a problem actually playing but the whole 'earn money by playing silly clicking games' is a bit weird. No idea if the 'manager' is supposed to be working or not I bought the most expensive stuff I could but don't see how it works (I earned about 1.2m in one clicking game). Seems the 'main' game only continues after you have bought a certain amount of sex scenes with the money you earn.
Seems you can only save when you are in one of the scenes you have bought, not sure yet if that means the money you won stays there or how it continues (I've only played this once).
The Black/blank screens are annoying but seem to only come up between scenes where it switches from single frames to moving scenes, so maybe it's to do with loading some sort of 'player' for the graphics.
So far the most annoying this is that after you get to the minigame section it seems to then ignore any sound options you may have set as for me it's turned the voice back on and I can't turn it back off as it only speaks in Japanese.
I will say that the renders are great but the whole having to click an 'X' to stop the action is a bit weird and the action is of limited extent