I had recreated the normal flat color button i had before into some thing more interest like the button in some space ship to create the feeling.
I had also change the enemy space ship from previous design into this
From flat color background i had change it to a moving galaxy background to make it look more interesting.
And last i also add in a score box to show each player score every time they lose or win the game so they can compete with each other. And i also change the game over word and success word with better graphic.