It's a funny little game if taken for what it is, an amateurial game with no big pretences. I actually appreciated the choice of making monsters good and humans evil. A change of pace from the same old "band of teenagers" plot.
There are a couple of spelling errors, but I suppose it's understandable since the author is not a native english speaker and actually most of the dialogue is written right and you get the gist of the plot immediately.
There is a lack of polish, though. Redundant spells, poor balance (Ogrus especially becomes useless later on, Slimer becomes a two trick pony with poison cloud/bodyslam and the rest is done with ailments or nukes by the imp and the succubus), characters having the same weapon when they should not (the imp and the succubus have the slime's poison in their main hand slot like Slimer).
The Iron Axe does not have an attack animation.
I'll also point out that there are two points in which the game does not really give any clue on how to progress, the first one nearly made me quit the game, the shiney for the imp is apparently a random drop from a random encounter (and up to that point there were no random encounters in the game), but if you don't meet wisps or you meet them and they don't drop the shiney you'll be thinking that there is something wrong with the game and that you're stuck because of an oversight, or that this is a demo and incomplete.
The second one is in the tower of Miria, where you have to kill deaths to proceed, even though there's no hint about it, and those deaths fly away most of the time and force you to wait and hope they'll be on a walkable tile so you can engage them.
One final note is that the boss battles are too easy because status like stun/poison/paralysis/confuse/silence (that you have in abundance) also work on them. The final battle has 3 bosses and they managed to give me 2 hits in the whole fight, they were disabled by ailments and killed off by poison (which isn't even that slow). The fact that you can buy for cheap items that increase HP, DEF, MDEF early on makes everything even easier and if someone spent a few minutes (!) farming, he could be immortal right from the beginning.
I still think that this game could be improved a lot with a few minor tweaks that would, overall, take less than 1 hour of development time. Of course it's up to the author to decide to do that or not.