So I downloaded the Halo Wars demo and have been playing it, it's awesome. It controls are very, very well.  Single player seems okay, the cutscenes look nice, but multiplayer is where this is going to be sweet.  In the demo you can do a 1v1 skirmish against the AI on easy, normal, or heroic as the humans or covenant.  I'm going to buy this game.  

Skirmish AI:
The Heroic AI was way too easy for me.  I beat it on the first try.  Now I'm pretty 1337 so it's expected I would win, but there was no grayed out option for Legendary.  Does anyone know if they have Legendary in the full game?  The only way to make skirmishing the AI challenging would be to play against more than one if there isn't a Legendary.  

Playable Flood?:
The 2nd cutscene it shows the covenant opening something that supposedly has the flood in it.  Any word on if the flood are playable, especially in multiplayer?  If they are it makes the game even more similiar to StarCraft. Human=Terran, Covenant=Protoss, Flood=Zerg.  Which is far from a bad thing, as long as they did it right.
There are a lot of maps and characters grayed out that will be in the full game, but nothing for the flood.  So either you can't play as the flood or they purposely did not show them grayed out to be more of a surprise.  Maybe you have to unlock them by completing a portion of the game.  

Game Types:
The only game modes the demo shows are Skirmish and Deathmatch. Deathmatch you get a ton more resources, so nubs can fool around.  There is a limit of 6 players.  The demo only mentioned playing 1v1, 2v2, or 3v3, but I'm assuming you'll be able to do free for alls and 2v3's and such.  Although there were no such grayed out options.  I'm wondering if there will be more game modes.  

Maps:
The demo only has one playable map, there are 13 others grayed out.  I read something about more maps coming with the limited edition game.  I didn't see anything about a map maker or saving replays.  


So far I like the humans the best.  I've only played one skirmish as the covenant though.  I'm pumped for the full game.  I feel this game is a bit underhyped.  I haven't really seen much for advertisements or coverage.  I know kikizo did a preview thing on it a while ago.