Plutonium

I have clicked on the advanced settings TAB .

I have high settings.
See the difference between both pictures?
If you click on TEXTURE QUALITY ,you can set to manual.
Then pick LOW in the new tabs that appear.
Also see the TAB called IMAGE QUALITY.
I have set mine to NATIVE ,this is max high setting.
Change that to LOW.
You will find that makes the other settings low for you.
Also before going to ADVANCED SETTINGS TAB,
look at screen resolution and set to 800by 600 or even lower mybe ,not sure if 640 by 480 is supported or not.
See if these suggestions help at all.

I will try these out.

You have done a fabulous job with all the content you have provided.
Good job.

Look forward to seeing more of your work.