look really good, there is the reescaling of the pixel art, it's stand out a little, with the short time of the jam is a expected issue, you could use a shader or filter that round the image in general to hide it until you have the properly scaled pixel art(and left the shader as a alt style in options, a easter egg , or a price).
With the concept and the limitation, sincerely the bowfire not have propource beyond being a switch to fight the boss making it redundant for the gameplay
I insteand whould start with bowfire on, make the boss appear when the bowfire is off,. shif thing to maintain the bowfire on, and instead make that each you use action it push the enemies out of the fire, in a way you have to strategice if is better to burn the wood and gain more time, or push the limes out.