Go to where your mountain is and take out just a few stitches, sew in another 2 or three thread widths. Do this in all the seam that are puffing out. It works and doesn't distort your star. Just be sure you just do 2 or 3 threads width and a few stitches only. Then press (don't iron) it flat. If it is still a problem, smack the remaining bulk with a hammer as others recommended. PS- don't give up because your star is BEAUTIFUL.