Gets very monotonous very fast. And the fortress assaults could've been better done - I haven't finished playing yet, but so far it looks like the only thing that's ever needed is two catapults poking the enemy castle. Can't really comment on the dialogue or plot. I skipped almost all of the talky bits because what little of it I saw seemed pretty generic.
Is the "Save a Companion" thing bugged? I see my companion dead with arm outstretched but no option to revive. Spamming the "G" key while walking back and forth does nothing either.
Use Poison and Freeze (from some weapon effects) against Greg. Poison deals damage by percentage current HP, it seems. It takes down his HP very quickly at the beginning. Freeze just stops him from moving.
That last ninja in L14 is a pain. Even if I hit him with a fear, he doesn't run around long enough for his smokescreen to wear off. I ended up relying on the Banshee Crypt's strip power + some luck with activation.
I stuck on as many starbursts as possible. Works well if you suck at aiming - Just fire in the general direction of the enemy or at the center of the bubble.
I can't discard, and it seems the computer can't too. I had to leave one game because I couldn't play anything, and the computer just stopped halfway through the next match. I'm guessing the same thing happened to it.