Honestly as a fan of Realm of the Mad God this game isn't too bad, and the final boos is beautifully made. I managed to beat the game using only the starter staff, the starter sword, and absorption armor. The basic mobs have a bit too little heath, while the turret guys have too much health and are easily dealt with using very evident safe spots. The bullet patterns feel very similar to Realm's own bullet patterns, and are very easy to dodge.
P.S. Most enemies can be dealt with by just equipping a sword and circling them with hellborn or absorption armor. (this doesn't work well on either of the bosses (if you count the nightmare blob as a boss because it does occur again as a standard mob)