About the terrain patch: I created a black and white patch with the Gimp, menu Filters->Render->Clouds->SolidNoise...

I did apparently not save the Gimp project in xcf native format.

I made a green and brown variant in PNG - I still have a PNG file of 1.2MiB of 960x640x24bpp RGB (in green and brown). Please let me know if you want this file.

Later I reduced this (with Gimp) to 4bpp with a palette so that the file size shrunk to 250KiB.

The following explains why there is no more variation in the terrain (in reply to the remark of paakku on irc 2010-05-16@12:43):
I started this level as a table-top factored strategy game. It was intended to look like the walls of magma and the rows of trees are un-natural. In the beginning, I even used a "burlap" patch, i.e. a woven textile terrain.

Hi *,
A long time ago, I started this level, and finally I managed to make it worthy for publishing.

The level is intended for one player against the computer, and starts out on multiple fronts.

It has its own AI which makes the enemy quite powerful.

Regards,
Michiel