You know, mrdrnose has a real knack for making teachers that fit with the certain subject of a level. Like honestly, Viktor, Marzia, and Alice all fit amazingly well as the teacher of their subjects. Alice's appearance and voice seem like a history teacher and also work extremely well as a teacher for not having a mask on like Viktor or Marzia. Viktor and Marzia also have amazing voices/looks that fit for math and language teachers.
Speaking of voices so much, a lot of the charm of this game comes from the text-to-speech voices, that is why voice acting would ruin the game a bit. If there was voice acting for the game, considering the kind of game this, you would be dying and hearing their opening voice a ton of times over again. The more you would hear the voice acting, the more mistakes/problems you would be hearing in the opening lines, becoming more and more apparent, as well as the more annoying, these things in the delivery become.
Imagine a minor voice crack or a stutter during Viktor's lines while doing brainiac mode, imagine listening and realizing this mistake after attempt 3, imagine then listening for it the next times that you die or restart, imagine it becoming more and more apparent every time you restart until it gets agerivating to listen to. With text-to-speech, this problem was overcame, intentional or not.
This might be really random, but I kind of want to help you make the game a bit, Mrdrnose. If you aren't Mrdrnose, I don't want a ton of other people to start volunteering to do this same thing now after I asked this, as it might ruin the experience for you or something. Anyways, I have some experience making maps in Unreal Engine, and I want to maybe help you create the layout for level 3 with your guidance (not including teleports to secret areas or adding properties of objects) and the you add whatever properties, secrets, notebooks, teleports, or whatever you desire afterwards. I could also just correct mistakes in the translations, if that is all you need. I am not the best in making things, but if you are going to be busy all the time I might as well do something while you aren't making the game.