It's a pretty nice game with a simple premise. Reconstruct Springfield and get all the character working. I must admit that when my friends got me into it, that hardly any of our own Springfields looked alike. I think my favorite rendition was a 'venice' take with more rivers than streets.
In regards to Donuts? Well, maybe if this game didn't depend upon an "Always Online" connection and gave players the ability to earn donuts with a bit more work, I would be more willing to spend money on extra donuts. But as it stands, this game will one day become extinct via server shut down and all the $ that was put into it will be rendered useless.