What an interesting gameplay! Love that you use voice acting in informing what's happening!
It got pretty difficult once the NPC emotion part appears, and I find the list of task confusing. I'm pretty sure I did only one from the list and the other just disappeared, ...too bad, I was taking mental note to do the next one right away...
But it's a  fun experience nonetheless~! I wonder how this idea and mechanic can evolve. ^^

Was reading the description of your game, and was  trying to imagine what kind of game to expect  and how it would play. For one, I  had absolutely no idea of how this  will look and play like, and second, I was sure once I start playing, I will understand nothing at all! But what a surprise... Not only have you found a pretty creative way to express that idea through an UI and inputs, but also, thanks to your excellent narrative, I knew what to do from the 1st second on! Great job!

To your questions:

Difficulty balance - I got  everything pretty well done until the NPCs came in - the act of translating emotions to these switches was too much for my little multi-tasking abilities. After that, I  everything went down the hill pretty quick.

Difficulty level and design of individual mini-games: The minimap was surpisingly well controllable - I thought, this will break my neck, but it didn't. The slider is to hard to control - a number input (just any number you type is interpreted as HP) would have been better, I think.

I am left with wondering what kind of game the player was playing ;-) Putting all these things I had to "display" together, this game must be a wild and crazy one!

An interesting premise. The game really starts slow but ramps up after a certain point. It got really difficult to manage, especially with the screen (seemingly) bugging out the text if you do manage to be quick. With the pace, it rarely felt like a good choice to be checking the in-game instructions.

Computers invented HI (Human Intelligence)

Good game, but I had a bit of trouble understanding how the npc emotion  one worked

It's quite an interesting game, no doubt! The voice acting and sound effects – they're well done. The voice acting is on point, and the character is talking directly to you, which I liked a lot.  However, I must mention that it was a bit challenging to fully focus on what the character was saying while handling tasks. At the beginning, it wasn't a problem since the tasks were simple. But as the game became more difficult, balancing both became tougher. It makes me wonder if that's intentional to add more difficulty to the game.

Regarding the graphics – they are nice! I'm not an expert in 2D art but it would be interesting to see the pixel art in another amount of bits.

On the gameplay side, there were some issues. The instructions in the book didn't work properly. When I clicked on "instructions part 2," it got stuck there and prevented me from accessing other sections. Occasionally, closing and reopening the book solved the problem, but it felt like a time waste, and I ended up losing a few times because of it.

Overall, HUD is an interesting game with nice voice acting and graphics. Although the book glitch were a bit challenging, the game offers an enjoyable experience.