Adding new screenshots

I've added two screenshots of the Modern and Classic game and also one of the current Menu.

Menu is just functional, I'd like to make it nicer but my Pixelart is definitely sub-par :/

The ball is very nice, it comes from a soon-to-be PICO-8 book that I really want to buy: 
https://www.kickstarter.com/projects/bumblebee/how-to-make-games-with-pico-8-eng...