Seriously, have more numbered stat information, like what effects the primary stats actually have, MP cost for abilities. You can't call this an RPG if you can't make informed decisions.
the problem is, with a hard track you don't have much opportunity to learn, so i end up playing everything on Easy. need a free play mode (i.e. no high score, but no game-ending penaulties)
simple unbeatable setup: symettrical at either end, place on top of eachother in the following order: piercing, cannon, 3 sleepers (or an eye in the middle if ghosts are present). Rely on sleepers alot before you unlock the other towers. For survival, make sure you have the soul sword upgrade. Use booster blocks if you need a high stack quick, then replace.