I couldn't figure out past the level 4 with the pH. I loved the idea, I felt like a little witch student who is hyperfixated on magic and magic books. I think the concept of the game has potential, but the theme hurts the concept. I imagine exploring this like a little alchemist who just tries to brew stuff and then the actual experience I gained from the experiment is written down in notes and I can see - eyeball only below 30 degrees etc. I managed to play around and get temperature up to like 200 so the playfulness is there. The fact that you made everything by scratch makes this even more impressive, the models that existed in the game was super nice. 

There were some camera bugs, environment shaking, but they didn't made game less fun. :)

I think a more cozy music would be perfect for this, current one made me anxious.