Well...
Fun physics game. You should check your quotes though. Newton said "If I have seen further it is by standing on the(ye) shoulders of giants" rocket science didn't exist back then. I don't know about the other quotes but, you know.. May want to check that.
Other than that great game, very fun to play. I don't know about replayability though, I am still running through it.
Keep up the good work. 8/10 5/5