Nice little crafting game. Kind of evil to have your test subject that you throw potions at. Made a yellow potion that didn't seem to have any reaction. The red potion, I felt like I drank it instead of throwing it? It was a little confusing at first that you need to interact with the bench to get ingredients. At first I thought each of the squares against the wall would give a different ingredient. Also, just a web browser game issue for using 'Esc' key as this just makes the browser focus on the active browser tab. So it was a little difficult to exit out of the recipe book because you needed to hit 'Esc' key twice and then refocus the game on screen each time. For future WebGL game, probably choose a different key for 'exit' function.
I didn't hear any sounds/music. Adding these in the future would enhance the game quite a bit.
Very nice pixel graphics.