The physics aspect is really throwing me off... The object leaves earth's atmosphere (where it receives a deceleration of a gradually decreasing 9.81m/s^2) until it reaches space. Space is a vacuum, therefore no deceleration should occur, minus that of the gravitational pull of other planets or objects. Then it would accelerate as it neared another planet. And in response to you're "I also asked my cats and they sorta agreed" comment, I am a dog person.
Enjoy your Physics!
-Jknite
P.S. I love this game though!