Algodoo

amazing.. doesn't even lag and goes >7500 m/s ... really impressive.. also, the separation goes smoothly... only poor laika didn't stand the high g's and got stuck somewhere between two part of the missile

Ah almost forgot, the turn mechanism is cool

i got it up to 10000 m/s

Thank you for good comments! Now i will make it more comfortable for Laika, put in some satelites, braking systems, parachutes, and make it go always >10000m/s. Turning system is by gyroscope because i don´t like lucid stabilizer stuff, this is more stable and simple. Strong G pulses are its only Achilles heel, but key-press-deletable fixating solves it. Pftwf: did you modified anything or it goes 10000 as is?

on my phun it say 15 mph

I'm a real Phun n00b at the moment, and the only rocket I ever built went about 20cm off the ground. (It was powered by a water-pistol type mechanism, and dumped all it's fuel on the ground .) To me, this is epic. And it hardly ever lags, either! How do you power it?
One weird thing: After removing all the stages, I decided to try landing (Or crashing, more like) the pod. Unfortunately, even after turning the whole thing around, the pod would not stop going up. Is that just because of the momentum from the other thrusters, or does Phun ever run out of gravity?
Still, awesome rocket. Now all we need is a space shuttle.

AAWWEESSOOMMEEEEEE!!! great rocket!!! the best i've seen so far!!! I got it up to
11000 m/s!!! Excellent job!

idk... i got it past 3 hundred million m/s at top speed.... -_-