More levels and graphic improvement

Hello there! We added new stuff to the game including menus and new levels and some graphic improvement here and there.

Background was a problem that needed to be solved luckily i think i have found a good way to make backgrounds for this game, we added a new weapon and ability and some a new enemy and some menus like main menu and pause menu (options won't be available in the early access :) )

We plan to release the early access on Wednesday or Thursday. Wish us luck!