Challenging moments of game dev

One of the challenges in development is tying all the events to the endings and making them interconnect. In the game, careless handling of pets or certain parasite removal procedures can cause harm, there's a chance to overlook or miss a parasite, and then there are unexpected events that require some sort of reaction. All of this needs to impact the endings, either adding details to them or changing them entirely. Hopefully, I won't get lost in this system while putting it all together...