You can use portals (the fireplace in your tower) to attack the other players island and conquer their lands, the other players can attack your island, too. Once you've conquered an opponent's land, it arrives to your island in 18 hours if the owner doesn't defend it back. And vice versa, when someone has conquered your land, you have 18 (15 in some conditions) hours to defend it.
It seems you were attacked and your lands were conquered.
Oh Karma why do you hate me. I laughed at the comments about loading as my computer filled the blue bar but then it stopped. After finding a magnifing glass and a pair of binoculars i could see the 0.0000000000000000000001% that required 20 min to load
"So you just add some skill points here , oh yes and here is a massive sword now just walk on a bit and ..... OH MY GOD ITS A MUSHROOM EVEN THOUGH YOU HAVE A SWORD ITS GONNA KILL YOU AHHHHHHHHHHHHHHHHH" and thats just the tutorial
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You can use portals (the fireplace in your tower) to attack the other players island and conquer their lands, the other players can attack your island, too. Once you've conquered an opponent's land, it arrives to your island in 18 hours if the owner doesn't defend it back. And vice versa, when someone has conquered your land, you have 18 (15 in some conditions) hours to defend it. It seems you were attacked and your lands were conquered.