Press up arrow key to go up. Press down arrow key to go down. Press left and right arrow key to move left and right respectively. Using the clues find out where the box is. When you find the box press the letter "e" the check the weapon. Press the letter "e" again if you want the weapon. Press no. 2 to change to your weapon. Find the enemy using the clues. Press on the screen to shoot. When you do not have the gun and press no. 2 nothing will happen. When you do not have gun and press on the screen the sprite punches but that will do no harm to the enemy.
Thanks to @abhyansh18 for the code and @legendsofcricket for the making of the backdrop and sprite. Please love and star. Stay home, Stay safe.