update : Android version and minor changes

another update! 

What's new? :

-As the title says, I have made an Android version of the game! The apk is available for you to download!

-the coin in the first level is way easier to get

-the sprite for the cup has been changed

-to change the gravity up and down, you only need to click a single button showing the current gravity (little arrow) and the gravity you will have once you click the button (big arrow)