Is there some sure way to finish all the 5 repeats?
Somehow i managed to compleate first round of this one in pure luck, only the 2nd round
i discovered my ships started to explode like the new years fireworks, had several tries and it seems only to explode up in my face.

(Only after i did the first round i discovered the counter reset to 0 on kaboom-in-your-face )

yes, you just have to be patient.

You just need to be patient. The key to completing is to stay calm, and above all the most impor***KABOOM***

Add shields/hull to withstand more than 1 explosion. Do more of it at once. (something like do 5 times in a row rather than 2 times in a row)
Seems like that way "failure" chances are reduced, or at least for me.

I have now finished all repeats of if, for it worked to do one time, then wait "a bit" and then do next and wait "a bit" thru it, only kablew once then.

There's a chance on each click that you will trigger a failure and explode, it doesn't have anything to do with time. To complete missions with failure possibility you just need to be persistent.