Tutorial Menu & bug fixes (v0.18)

In today's update, we did many bug fixes such as fixing spelling mistakes and grammatical errors. We also fixed the bug where the background music didn't loop.

New changes: 

• New and improved tutorial - more interactivity and detailed
• When the game is over and the game over menu appears it will tell you how you lost

You can follow live updates and future plans at: https://trello.com/b/JriDRNu4/apocolypse-survival

Or on my discord: https://discord.gg/2JtzRG8v