Not really sure what happened but i noticed when i first played that if i dont turn my computer's performance up to max the gameplay slows down loads. i didnt mind before this since i have a workaround (turning up my computers performance) but at some point even with my performance set up to max the game suddenly slowed down.
I figured its probably my computers fault since it was getting hot and the cpu was running around half the speed as usual so i put it into sleep mode for a while and went back on after it cooled down... the cpu speed sped up but the game was just as slow as before... (granted this time my fps didnt go back up to as high as it was when it first slowed down/is usually)
so not really sure whats going on... but the issue made my friend who was playing at the same time have double the playtime counter ingame (not sure what those 100s are meant to be for but either way theirs was ~400 and mine was only ~200, yet we both only played for 11hrs.

Honestly just slowing down isnt really a problem if things dont break but as i just found out in a galaxy #4 destroy the eggs mission, afterburners that would activate after using jump thrusters no longer worked after it slowed down and i really have no clue what to do about that. (since i was relying on afterburners for a getaway). In this specific case i can probably just restart the game and it will go back to normal speed but it doesnt change the fact it keeps slowing down randomly. On an irrelevant note, i noticed that, once i died on that destroy the eggs mission, the game (or what can be seen behind the message) seemed to slow down ridiculously (not fps though - that stayed constant).