Nice video, but you don't seem very good at your own game. That or you need to balance it a bit more in your favor.
It's actually currently way too easy (need it to test level completions, etc.).

I'll ramp up the difficulty a bit for the PGD version, but not too much, so it won't take hours for the judges to reach all the levels! (8 distinct maps right now, with 11 locations, as a couple maps are recycled twice)

Looks very interesting, better graphics for enemy and defence units and it will rock!
Alas, that's probably something that won't happen, I'm just too ineffective when making graphics, and they don't even look very good...

On the other hand, there is already a "Challenge" (hard, infinite, semi-random) mode, for which I would like to squeeze in global leaderboards if time permits