Game is very colorful and lots of mindless fun, can be addictive, rewards were fair and steady. I gave it 5 stars. After reaching higher levels of 500, 700, etc, I noticed they did not give me ALL coins due for ads watched. Now I'm level 1,038 and I NEVER get correct coins for ads watched. Now 2 star rating. If continues, will give 1 star and uninstall. I NEVER pay to play ANY game. DEVELOPERS: Give CORRECT amount of COINS in ALL levels for ALL ads watched. Simple.