Just tried out the demo and I like where you're trying to go with this! I think the real test will be what happens after the assistant is created to see how you balance adding an NPC to the mix so things don't start to feel busy or messy, like having too much dialogue or interruptions. I love the main character's voice, by the way!
My main feedback is to tighten up the interactive elements so clicking and other actions register more quickly and cleanly. Also to maybe add a zoom mechanic when picking up objects and documents to make them easier to read or examine if possible.
I hope as the game progresses that things get more difficult and require more abstract thought, but keep in mind that the harder you screw gamers over by having the game end whenever they "violate protocol", the better the content of the game needs to be to make it worth jumping back into it and the more mindful the checkpoints should be. So far you're on the right track. Good luck with development!