You can't beat this on your first try, and when you reach a game over, instead of reloading your checkpoint with your stats, instead you get respawned at the checkpoint with 97% lewdness, so from there a game over for a second time sends you straight to the start of the game. This is a pointless waste of time in terms of progression.
When you play through repeated known events, you can't skip. In fact, if you spam click you get lag. Absolutely baffling, the devs haven't tested that at all.
The H-scenes are also, unbelievably, lazily made animations, most of the art are 2D scenes. So even if you wanted to watch some porn, you can't progress further.
The gallery is an in-game level editor letting you create these turn-based labyrinth events, kinda like creating your own story, but like, seriously? Why would anyone spend their time making levels?
Oh and you know what it takes to beat the game? Save scumming.