Too hard.
At the higher levels past the guy with the ton of armor, there are these guys on pig-cow things that are too fast and have too much health. And your castle has an incredibly small amount of health when they actually start attacking. Leveling up takes too long, and swinging your sword does way too little damage to bosses and them. But the graphics are fine and gameplay is okay, but if you are standing on one size of the cliff, and the boss is on the other side, the boss can cross the large gap, unlike you. I mean under or over top of the bridge.