Is it normal that i am addicted to mahjong?

For those who don't know what Mahjong is, its a Chinese game where you basically match tiles, it is pretty fun in my opinion even though I prefer to play the game on a Windows computer ( So essentially stuff like Mahjong Titans or Microsoft Mahjong. ), it is fun to the point that I am addicted to the game. But also it helps me to lay off other games I play a lot.