Thank you so much! I'm glad you enjoyed the VN! :D
The only place you can save and load is during the part in True Lab. Once you reach the Lab where you meet General again, you can't save/load. And, you're right. Losing the ability to save/load, the single ending, and not being able to tell General the truth at the end... those are all ways to convey to the player that they're not in control of this world.
This VN was definitely "just an experiment" (lol) for me to try new things with Ren'Py. I probably won't be adding to it, unfortunately. ^^;