If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your goal in this game is to demolish the wooden tower which is found in the game page as you'll have to make the shattered wooden pieces to fall below the marker-line, to proceed to higher levels. You will come across some wooden strips, where you cannot place the bombs. So take note of this, and go through all the levels.
This game is played with mouse only.