This splitting thing is totally useless... If you use it in, like, the last level, it's 100% that you copy will just run into a virus and instantly die. And it's very irritating having to wait for th enemy to split. 2/5
It's got a couple of bugs... Sometimes the number in the lines/columns get gray even when you didn't complete the rank. And sometimes it just says that you completed the level, even if haven't...