I have to say I preferred the skill system used by the second one. I think if you changed that and threw in a bit more of a storyline, I would like this one even more than the second.
I think this is definitely the best of the three Protector games. The gain of a skill point for every new map completed is more effective than the exp system, and I prefer the greater amount of information given by the advance wave viewer thing.
It's great! If you enjoy Roleplaying.
And if you managed to get to level 50 in 5 days, I'm not sure people would like that, especially if they got to their position only after a long time of playing. Slightly illogical, but...
People-
It was bad enough having a floating castle in the first one. Given that you are moving around the world, your castle should not follow you. That just wouldn't make sense. So, you build a new one from scratch, or close to it.
These graphics are the best of any game I've ever played. Do you know why? Because they're my graphics. I see and perceive this world the way I wish to. And it's awesome.
 "Raider: Episode 1"){kind=icon}
 "Battalion: Skirmish"){kind=icon}
 "GemCraft chapter 0"){kind=icon}
 "Protector III"){kind=icon}
 "Protector: Reclaiming the Throne"){kind=icon}
 "Knightfall"){kind=icon}
 "Music Catch 2"){kind=icon}
 "Bowja 3 - Ninja Kami"){kind=icon}
 "Monsters' Den: Book of Dread"){kind=icon}
 "Don't Look Back"){kind=icon}
 "Iron Realms"){kind=icon}
 "Epic War 2"){kind=icon}