I noticed that the hammer only swings down when the cursor is currently over a mole. I think this is a mistake. For awhile i thought my mouse wasn't registering clicks. I think it would be better if the hammer swings down no matter what and then check to see if anything is under the hammer once it reaches its full swing. I like to click before my cursor is over the mole and move as it is swinging. At least, that's the most intuitive way IMO. Theme and graphics are 5 stars though! Good job.