To be honest, I thought I was playing something akin to Minesweeper cause I've never played Nurikabe before.
Furious at first, but little by little the game started to click for me and I started to really love the game. At the end of it got a chance to experience something new and look forward to playing again. I even beat the game 3 times of all difficulties cause I just wanted to play more.
Good stuff and great way to introduce Nurikabe!