When I played the game on my browser the game seems to work properly, so I added a fullscreen option. That might fix your issue!
It kind of helped, but there are still some visual glitches for me.
But I was still able to try it and I can provide some feedback:
I like the concept and different phases of the game. Although, it was not always clear to me what I am supposed to do. Only contract I was able to finish was the first one. I failed to figure out what to do with next ones. I might have been missing something.
Crushing herbs in mortar was satisfying. Boiling was not (it's just waiting - it might help if you needed to stir it during that time or something just to have some input).
I feel like with some tuning here and there, it can be really fun game.