Typical game to just get badges and never play again. Dreadfully slow progression, not so entertaining gameplay and you literally can grind by buying gold and spending it on nearly everything to speed progress up. It's P2W at its finest.
I got a nice tip for you guys for Dark World Level 12 Reflector stage. Just put a small round sticker in the middle of a screen (where red and blue balls meet) and manevour around it (remember blue ball is invisible, but always on the opposite site). 94 points for the first try :D
I guess I found a bug. I'll try to shot this here:
X
X
O
O
O
X
O's and X's represent particular block. We got line of 3 O's which disappears and there's also line of 3 X's, but additional X falls from above, so it should be line of 4, but apparently it counted for me as 3 and this additional block which fell from above didn't apply for that line.
 "Iron Rage"){kind=icon}
 "Incremental Cubes"){kind=icon}
 "Beam Ball"){kind=icon}
 "FPA: World 1 Remix"){kind=icon}
 "BioGems"){kind=icon}