I was waiting for this game since I first heard of its release.
The game itself plays like a basic bullet hell game with basic movements (up, down, left, right).
It also features all three characters, switchable at all times, every character has its own purpose (for example Blossom can melt ice, Buttercup can shoot through solid walls.......)
I was surprised about how smooth the game actually plays, unfortunately the length of the game is ridiculously small.
If you do not care about clearing every room or collecting every achievement, this game will roughly take 1.5 hrs to complete. Probably around 3 hrs, considering you want to complete everything the game offers. WHICH IS ACTUALLY NOT TOO MUCH.
The story of the game is rather.... meh. It feels like a Newgrounds browsergame (which it was probably intended to be)
You start your journey as Buttercup, realizing that your sisters are missing and you forgot all of your powers. The first 20 minutes of the game consist of collecting your abilities and sisters. (which includes two boss fights), after that you fight another boss to rescue the Major and the last boss is Mojo himself (If there are some other, hidden bosses, I apologize as I didn't clear every room).
5.99 (EUR) might be alot for some people, but I guess the money was well spent. I have no regrets getting the game and if they were actually going to make a sequel with more gameplay, more story depth and more features, I wouldn't mind paying 20 Bucks.
My conclusion is that you can, without a doubt, buy this game without regret if you enjoy either the bullet hell genre or Powerpuff Girls.... and if the developers were to add DLCs or a sequel with more content (more than 2 hrs of content that is) it could easily become the Touhou of western civilization. (lolnope)