Minor Text Updates and Font Settings Adjustments

After watching a few streamers play our game, a few more typos were brought to our attention. We've updated the text to read correctly.

There we also suggestions to make the font more readable. The font should now be more "crisp", appearing more slender with gaps between letters more defined.

We've also included the cover art to appear as the background on the main menu screen.

Lastly, the "quit" button was removed from the main menu of the WebGL version, since "application.quit" doesn't work for that platform. Whoops.