I've been playing this game. It's pretty fun but obviously needs a lot of work. I have just managed to get a rocket up to an altitude beyond 1.1 million metres, but I don't think I have enough lateral speed to get into orbit, the current time of this flight is 21 minutes. Now I'm still climbing at 500m/s, but decelerating, the next version of this game definitely needs a way to speed up time.
It also seems to have planned a money system, that is not in effect yet, this would be good to get more of a learning curve, and reward achievements.
I find it pretty hard to steer a rocket that can roll, it often becomes hard to tell which way is "up", Some kind of distinguishing features on the rocket parts would help
More parts and a way to place the wings/fins more precisely would also be good.