actually it's 60 seconds.,but plus the flying scene and delay on u trying to tap 'w' and press anywhere for next hyperspace,that's why u got only 38 seconds to recharge..
and pianomanDylan,the first wave of darkcreeps can only be damaged by first upgrade and above of all tower,and the second wave of darkcreeps can only be damaged by second upgrade and above of all tower and so on..
hey jubalee, u read my comment..let's report this to greg..since we got our right to receive the hard badge..man i was like 6k+ score in hard mode and c'mon i also got no badge..!we got into the same problem but dont worry i'll help u,i know the person who make badges in kongregate..
*pliz somebody (kongregate-greg help please.. or DTD)to check my hard score wether if it's 6k+ score or not..and if it's true(i know it's true i've seen with my own eyes and it's 6k+ score), pliz gimme the hard badge..
*sorry for the last comment..i was so emotional,but c'mon man i'm suck at playing DTD and barely i get hard mode with 6k+ score and i didnt get the badge?tell me,whoever in this situation wont be pissed off?who won't???*