Good, but not great
There were some really good things, but also some really bad things about this game. Instead of putting it in a paragraph, I'll make a list for once.
Good:
A wide choice of strategy. A great change from the 'One-Way Track' TDs.
More RPG then TD. Makes it more original.
You don't have to play it in one sitting. For a game this long, it's necessary to have saves so kudos on that.
Bad:
THE MUSIC PISSES ME OFF!!! get a wider range of music, PLEASE!
It's not fast paced enough. The levels don't have a very excited edge.
Sound effects. If you're making a sequel or are updating this, add sound effects.
Difficulty ranging. The first level is ridiculously easy but as the levels progress, the difficulty gets higher at an very steep rate.
It's not something you want to play too much off in one day. Personally, I shut it off after the first level and played more the next day.
Overall though, it's a good game. It's not the best TD in the world, but it certainly has potential. If you make a sequel, keep it as it is, just make it a little more action based rather then time consuming and CHANGE THE FUCKING MUSIC!!! I had to put it down from 8 to 6 'cause the music is just that irritating!