A game like many, many others.
It's all about guessing if the hidden card is higher or lower from the one already on the table. Afer afery consecutive guess she allows for more intimate demands. There's like 10 stages, with the last one being of course having sex with her. There is no such thing as a tie, if the hidden card matches the on on the table, you lose. At the beginning the game allows you to start from certain point, but for some reason you can just skip ahead and start from the point you never gotten to. So no full save begging this time needed.
Animations are really basic. It's clear that the girl model is separated into limbs that just move by a set degree after a certain period of time.
What is nice is main girl voice acting. What is not nice is that every line she says sound like the VA could not decide where to stand while talking into the microphone. One line she says normally, the other one into your left ear, another one into the right one. It's not even relative to what's going on. Kind of like those 8D videos on Youtube where the sound is just moving around.
The translation feels weird. It seems like the person behind it (if it really was someone, not just putting text into translator and pasting it) barely knows English.
That's all. If only you aren't super into cards and gambling then playing this game is a waste of time.