thanks guys. got it, i just had to put the vector code in the thrust input. where as before it was in an update physics method in the loop, now I put the cos sin of vx vy in the forward thrust and rear thrust and leave the x+vx stuff in the update physics method and it works, after testing for a few seconds, so who knows if i run into something else along the way. I want this type of movement for a different game than the one i am doing now.