A score of at least 95% is required to get a gold on a level. Aim for this score in each of the Cottage levels and this is yours.
For the shopping bag level (Level 97), I suggest you take out the upper right square of the bag (above the green square) with that spider first. Ensure the spider is near the frame of the bag. When it gets burned, it will send a line to the frame. Rotate your phone so that flame takes out the red ant (and turns red). Direct this flame to the spider at the other side of the frame (by the red square) so that it can send a line to that square. The flame(s) will take out the electric bug which will send it to its partner at the frame. Ensure that the square is completely burned out and that the outer flame (now going to the handle of the bag) does not go it. Rotate the phone and press on flames to speed things up.
When the red square is gone, pay attention to the handle and take out the blue ant. Use the blue flame to take out the rest of the frame and rotate the phone quickly to take out the blue rope and the spider there. The spider will send a line to the blue circle of the bag. Here is where you need to be careful. You want to ensure that spider and the green ant are outside the circle so as not to cut them off as you need that spider to send a line for the green flame to the green square. So burn the blue ring and have the flame pass by the green square first for better control. Turn your phone slightly to slow the flame. Do not let it go out. As soon as the spider goes out of the circle, speed up the flame, keep your phone upright (by then the blue flame will go up the ring and hit the brown rope) and stop the flame from burning the vertical piece that the spider travels by "forcing" the flame down the rope. Finish burning the blue and turn your phone to the right (as the blue ring burns out) so that you can send the blue flame to the green ant. When that ant is taken out, slow down the now green flame and time the spider so that the flame hits the spider as it comes towards the bottom right corner of the square. Do not allow the spider to turn (speed flame up if necessary), the spider will now send a line to the green square for you to burn the square out to get at least 95%.