My bubble shooter

Very very simple bubble shooter game!
*Contains classic and spin mode to play.
*Several magic items make the game easy and fun.
*NO in-app-billing, get gold for free.
How to play:
Tap the screen and lanch your bubble! Also use the walls on both sides to rebound. Connect 3 or more bubbles in same color to clear them.
Feature:
*Classic Mode -- The fallen speed of bubbles are more and more fast. Get enough score before them reach the bottom.
*Spin Mode -- Bubbles can rotate around the center, It will be punish (insert some bubbles randomly) if bubbles were not cleared a few times. Clear the bubbles except center;