It's ok as far as the quick thinking math games are concerned. It took a brief moment to figure out what to do, but once you figure things out, it's a quick game.

There are some major concerns with this game.
- The background (flashing red) was giving me a head-ache after a bit. I don't know it need a seizure warning.
- The music loop is short and unvarying. At least you give us an option of muting.
- The 'High Score' counter does not register scores. I did purposefully get a wrong answer several times to test the feature, but it plain does not work.

This game is alright in small quantities, but you can't play for too long.