While I was hitting hard and banging all the enemies, Just came across a small bug, can also be used as a trick. Observe the image and make yourself clear. Start collecting all the coins, kill the devils and at one point save the game. Now again load the game i.e at the point where you have saved the game previously. Surprisingly you will see all the coins you have collected and all the devils that were killed previously reappeared!.
sInterestingly you can use this for your own good, for example you have collected 50 coins and saved the game, later load the game go back and collect the 50 coins again and kill the devils which will reappear. Thus one extra life and extra points. Levels are very different, tough and exciting. enjoy the game!