So, at the WARGS meeting last night I played through another game. This revision had some major changes to how combat works and that had thrown off the GM's Fuel accumulation. Which made the last scene too easy and somewhat anticlimactic. However a quick discussion with the players led to an obvious solution that should hit things about right. They used the second marine squad, including WE3 tribute characters - uplifted combat trained cat and dog - which went well.
I have also worked out how to manage 'one big alien' style creatures in, with basically no change to the creature combat rules.
Those two changes need to go into the next revision and a bit of explanation and clarification, then I'll be ready to open up a public playtest.
I also now have a good logo for Generic Games (thanks Daniel Steadman) and some great art coming along (thanks Daniel Gorringe). It all seems to be coming together for this one.