phew.....after going about 30 bubbles or more to the right looking for the destroyer, couldnt find it.Then i went 3-5 bubbles up and find it......that means that u have a higher chance of finding it if u go up
played the whole game without knowing you could sprint....:(
P.S :easy boss, just jump up on the platform when he's down and shoot at him and when he comes up, just go down and kill some small fries =)