Just keep wandering around through the bubbles, eventually you’ll find the boss bubble tank thingie. It doesn’t look a whole lot different than the others, so just slaughter every enemy you run across. It can take a while to find him, but you’ll run into him eventually.
But you should have found the boss…I cleared two sides before getting bored and there were about 4 bosses on each side? Hard at first, second playthrough i found it a lot easier, cant wait for te sequel…
