not too bad
The other reviewers are right, this IS a very hard game. But I thought that the challenge was the best part. I was able to get up to level 17, but my village had basically no health by then. Maybe consider making it just a bit easier.
I found that the level 2 and 3 lightning spells were completely worthless, as was the level 2 fire spell. Why not make these more powerful so that the player might actually think about using them?
Some tips for players: Start with the lightning spell since one damage upgrade gets you 75 dmg/hit, which means you can take out lvl 1 trinos with 2 hits exactly (you have to hit them twice without interruption otherwise they'll regen life and survive the second hit). Then get the Nova Blast spell as soon as you can, followed by the Easter Strike spell. Once you've upgraded the damage on those a bit, the levels become pretty easy until around 15. Also, the best level 3 spell is Earthquake, hands down.