save the ship - physics

Our ship went to space and we need you to save it from attacking enemies. The ship movement depend on detecting rays, It produce detecting rays to discover anything in front of it. These rays detects the wall lines you draw on screen and also the asteroids (rocks .. stones) of space. On the other hand the attacking enemies can not detect neither wall lines nor asteroid, So if you want to destroy the attacking enemies make them hits the wall lines or asteroids. Wall lines:- you are able to draw wall lines on screen to save the ship and also make it takes its directions as we said above the ship produces detecting rays that detect these wall line, So if you need ship to rotate you can do that by wall lines. Be smart when you are drawing wall line, Always take in your mind these wall lines are limited, So used them smartly and be careful to not destroy our ship. Gifts:- Our space station send some supplies every meanwhile to you. Do not forget to take it, Theses gifts like rockets, nitrogen, defender fire wall .. and some other you will discover it. Collect gems to buy some supplemental weapons from store.