Wow I love picking one of three things!!!
Shitty card "battler". Real-time for some reason which doesn't work very well with this genre, but also has some poorly thought out design like early cards being a trap and needing RNG to roll the skill that actually let's you get better ones. For skills you always have to pick one so at higher levels you're just uselessly swapping them out. Almost beat it on my first try and then realised there's a shop, so just hacked in points and AFK'd to victory.
There is no reward for beating the game, not even a gallery of any sort. There's also no animation variations between the girls, just different body shapes. idk mid/10 the girls are cute