The Theme was 'life is currency'. So I ran with it. You can buy Items to sell else where on the game map to make a profit. This allows you to live long enough to power the portal that allows you to progress to the next level. The basic game had buy and sell working as well as some basic artwork. I am currently in the progress of overhauling the game and adding more content. When the game has enough content I will be posting it on itch.io for a low price. Watch this space for updates!