Level 3425 is absolutely impossible to pass w/out boosters. More than that, it's impossible to pass unless you have multiple chocolate bombs and other special candies on the board to start. I've played it maybe 30 times using the max helmet boosters (chocolate bomb, two wrapped candies and extra moves) and I haven't even come close. Yet you tell your users that all levels are designed to be possible WITHOUT boosters. That's a lie and a blatant one. Many of your levels aren't even possible when released so you have to tweak them after the fact.
Why not just have your designers each play the level 3 times until it's been played 100 times and if people aren't passing it 30 percent of the time (or something reasonable), then tweak it BEFORE YOU RELEASE IT.
It's not a hard problem to solve, which tells any of your users who aren't stupid that it's a problem you don't want to solve.
Seems like a pretty stupid way to run a company. I'll keep playing, but I won't spend a thin red cent on this garbage and I'll disparage the company/its main product at any chance I get to anyone who will listen. Furthermore, I doubt I'm alone.
So, I say again: That's a pretty stupid way to run a company.