A bug or different version?

[AhmedAmrMohamed]

I was getting an error every time i tried to run the game maybe python3-running-python2 problem However i fixed it bu by changing line 317 to
for i in hit_ships:
and lines 329 : 333 to:
for k in hit_ships: k.kill() for i in hit_ships[k]: i.kill() ship.score += 10
now it's working perfectly.