The game needs to run in a 4x4 grid, and be responsive to be playable on a desktop web browser and on a mobile phone browser.
A game should last for 60 seconds.
Moles should pop up every 1 second in randomly selected holes of the grid
For the first 10 seconds, moles should stay up for 5 seconds For the next 10 seconds, moles should stay up for 4 seconds Every 10 seconds the moles should pop up for 1 second less, with a floor of 0.5 seconds
If a user hits a mole they score 1 point If a user hits 2 moles simultaneously they score 4 points For 3 moles 16 points For 4 moles 256 points
At random intervals, and not more than 4 times during a 60-second game a "bomb" should pop up for 3 seconds. If the user hits the bomb the game ends.
The game must show the running score total while playing