I absolutely love this! It is very satisfying and fun, with clever game mechanics!
If you could move the cursor to prepare your next move while the break animation still runs, that would be cool. Also, i noticed that i hardly had time to check the combo points being calculated since i need to watch whats happening during the block break. If you had simplified visual clues as an overlay close to the game field (like "2x!", "3x!" or maybe "bronze!", "silver!", "gold"etc..) it could be more rewarding.
But honestly, those are super minor details, i think this game works very well - congrats!!