Level design

## The problem
Level map is incomplete. The complete map needs to be designed.

## Expectations
- Level needs to be designed using [Tiled map editor](https://www.mapeditor.org/) keeping the [plot](https://community.amethyst.rs/t/story-ideas/988/7) in mind. The level is for the space marine story line.
- The level should have increasing difficulty as the player progresses towards the end of the level.

The assets are available [here](https://ansimuz.itch.io/sideview-sci-fi). Feel free to add / modify assets if required.
For those who are new to Tiled, here is an excellent [tutorial](https://www.youtube.com/watch?v=ZwaomOYGuYo).