Unfortunately, the engine does not currently support animated textures--and even if it did, creating them would be a huge pain in the butt. It's probably not going to happen. I'll have to think of some other ways to add life to the maps!
You could make one full cycle with perlin noise like you do now and cache the result to BitmapData, so creating them would be automatic. Also, if the problem is on big maps, only animate what's actually visible on screen, stopping animation on off-screen tiles.
Back to the game, I've managed to play it. Finished tutorial, but unfortunately during 2nd map I've got automatic win before I've even managed to finish building wooden bridge. The game definitely has potential, I can't wait to try multiplayer!
What will make or break the deal is the GUI you plan to implement. I hope you are not limiting it to the floating windows and mouse overs like in the demo and the game will get a fully-fledged GUI like the game it was inspired by have.
I know it's still work in progress but AI will need some work too, especially without ally-unit passing it tends to block itself in tight passages.
Can't really tell much more right now, I will probably try to finished 2nd level again later (as I assume it was a bug), so maybe more stuff will come up.