I don’t think extending the deadline will help, please include details about the map, and maybe a sketch or an example of what you kinda want. the deadline time is already good enough but please provide more information. I would be happy to make a thumbnail for you but there is not much I can do without much detail.
I made a little example of what people might want for details and you should use it. a good format would include details for the map (terrain/landscape) what the background would look like, and what the gims are doing (running/jumping/standing). this is a common mistake so don’t feel bad, just try and do better next time