Fun but no dart rewards

I love this game but it is VERY stingy with darts. I refuse to purchase them. I will play until I get tired of being kicked from level 10 clear back to level 1 because I am out of darts. When you play a lot they could at least reward you with more darts! 2 stars could be 5 if not so stingy!

J in Republic about Balloon Crush