You did a really great job with this! The concept, look, and mechanics are all very well done, and it's a great take on the theme.
Control-wise, I understand the fun of having the player throw the balloons/nails in order to use them, but in practice it was very unwieldy for me. I played through the game about five times, and I never felt like whether or not the balloon hit the fire or the nail went in the table was in my control. It either didn't activate or would go flying off the table, which was frustrating. It doesn't look like other people were having this issue, so it might be a matter of the player's mouse sensitivity on their machine, but still something to be aware of!
All of that doesn't detract from the fact that this is solid work for a jam-game. Congrats!