yeah, it's not really fun losing 500 bubbles just because you accidentally run into a bubble full of sticky/machine guns. But yeah, that gives challenge huh.
But wherever are the bosses??
Seriously, to take out 1000 balloons, it's gonna take heck a lot of time. Or someone tell me the number of balloons will increase as you reach higher?
(it seems it doesn't harm to ignore the defense and uplift upgrades at the beginning, until your money upgrades require a hysterical cost)