Oh, another advise as gamer, that a other post reminded me: you should add this non tutotial-"free levels" al the end of the game, in wich you coul include some other handicaps, and of different nature, as comppetition from other organisms or even other amoebas of the same population or diferent scenarios or missions with different dificulty levels with, for example, different avaliability of resources.
I liked the game a lot!! Being a biologist myself I know of its truthful, not no only in cell biology topics, but also in its jokes =P As a gamer, I should advise you to add some more "free level". It´s a little annoying when all the game is a tutorial and you learn to do a lot of things in game thae then you will bearli use, because when the tutorial ends also ends the game.
Anyway, I liked it! 5/5 It´s a grat idea and it is realy useful to tech basic cell biology! =)
I have the same question that Pystro did! I doesn´t end. I killed the "source", I looked for all the 5th basement, I went back to the 1st basement, to the place where you begin.... and nothing. You never win this game! It`s annoying!!