Out of my head? I don't think so. These kind of porn games projects usually get stalled by art, not code. I can't remember how many games in this forum died or slowed to a crawl because of art, but I can barely remember any that had it happen due to code, mostly because it is usually simple stuff like Renpy, RPG maker or point and click unity/java.
I imagine that Akabur has some organized and "efficient" code. I heard he makes a lot of redundant stuff and mistakes, but at least he must have mastered the "If you do <Action>, +1 <stat>" thing to a science since he has made what, 3 or 4 COMPLETE games that use this system? But like I said, I'd have to look at it to give you a certain opinion, which is effort I am not willing to make frankly.
The game "Four Elements Trainer" uses the exact same system training system, ie "do action, gain stat, rinse and repeat", (plus some other stuff) as Rogue-Like and Akabur's games, so you might want to take a look at their code to compare with too. Again, can't attest for its quality.