i found a bug and some other things
very very good but: the bug is i killt the red overlord with a xplosion button thing and when i did that the enemys didn't stop comin when i was at 1000 kills i stopped and did it over i killt the overlord with normal shots and i finished the level.
the other thing is the time is not correct the 5 minutes where like 9 minutes on my watch and the 10 minutes where like 17 minutes on my watch.
because of this i gave a 9 but very very good game u should make a part 2 please do that!