The concept is good but you can further improve on it by adding levels. There should be an easy level or a trial level so the beginners could be familiarized with the number pads. As soon as the player hits a certain number of bees, then she would progress to medium. Combining addition plus finding the right keys is really tiresome. I'm not slow at math, it's just coordination that I lack. Cool game though. Makes me really happy with myself when I am able to hit a bee. Sorry PETA.