Ahah. Clearly a lot of design went into the first boss. It was challenging to find the correct potion combination to win.
A mechanic I don't like is how the effects are hidden at first, and you have to test them. There isn't much challenge to it, you just buy enough potion and use them in the test lab to turn the ???? into description text.
It feels just like busywork just to get to play the actual game, which is to compare the effect of potions to find the correct combination. That part of the game is the fun bit, because it forces you to think.