Quite good
Hm, playing only the first few levels I wonder why this is called Tower Tactics, but I guess I just didn't play it long enough. The video sequences are awesome, incedible voice acting, really. And the music is marvellous.
But there's something that's bothering me:
When you want to use a skill you can't read up what this special skill will do, but you can read about the skills used. This resulted in me wasting valuable points and seconds. Maybe you could use a bubble that can be switched off if you don't need it, which explains the skill in game.
As a advice how to reduce lag you tell the viewer to "lower the quality" or something. Maybe I'm blind, but where the hell can you do that? The only option to lower the graphic's quality that I saw was to disable the blood effects. Poor me with only 256MB RAM (yeah, parents are cheap-skates -.-) sometimes gets the impression that this is a Dia-show ; D
All in all a very promising game which I would love to play with a better computer