It's just a bunch of magic
The game is pretty good but it could expand and be harder. I found that if your having trouble you just need more magic towers, it really just came down to a 90/10 percent balance; 90 to magic towers n magic upgrades and 10 to everything else. My advice if your having trouble is to make more magic crap, thats the only thing you need to remember. The graphics are nice n the musics good, worth wasting at least 10 minutes on.