Far too boring.
This game is like a very basic version of collapse, or like any other game where you just need to click to remove 2 or more blocks. There are no powerups, no levels and the game becomes boring rather quickly. Held my attention for about 2 minutes.
Improve the animations when you remove blocks, add a story, levels and maybe some powerups and you'll have a game which may hold a players attention for a great deal longer.