Frank lyerla

So I just got kerbal space program yesterday on the ps4 and have been having the time of my life until it started freezing Whenever I launched a couple of space ships (and they crashed into the ground) and went back to build some more but the my screen just froze I could still hear the background music but no movement and I had to restart and all my rockets were gone This keeps happening more and more and I can't enjoy the game HELP