Wow, one of the most impressive game jam entries I have ever played! I was seriously hooked and felt like I could just keep playing and optimizing for hours. The tutorial was really well done, and I was able to get right into the main gameplay after. Really, nothing I would improve, just some thing to think about is whether you would want to lay out the combinations or let the player figure them out on their own. Also, when I first made the fire, I thought it was bad, but then I looked at the hint sheet (which I do think was helpful in the context of the game jam). Seriously awesome work! Keep it up!