I'm disappointed too, especially since this looked like a (very) good game, but well... that's how Kickstarter works. You don't buy a product you buy a hope and there is no guarantee the developer will keep up his/her promises. More usually not than yes, overestimating his/her abilities, long-lasting devotion to actually finish the thing, time available, scope of the project and sometimes - but that's imho the most rare case - becoming the victim of some unexpected/unpredictable events. There is a reason why there are those "evil big companies" with deadlines and employees with obligations to "deliver". Leaving the project dead without at least an apology is perhaps "not nice" but his/her very right. You can rant about it but that's all you can really do.
"Not nice" is flippant way of putting it, considering the developer does not believe the 300+ people that gave them cash and supported them for the past 2 years are no longer worth their time.
A five minute tweet owning up to zero progress is worth more than another page of empty apologies.
"I'm really ashamed how late I've been with this update... You know that feeling you get when you know you should call someone, and you mean to, but time keeps getting away from you, and then it feels too LATE to call them, and you end up putting off the call even longer because you're embarrassed...?
That's the feeling behind this update. I'm so sorry, everyone! :( Barring some major RL catastrophe, I'll try not to disappear so long again."
This was last posted last year. Chances are they could be putting off again due to insecurities. Makes things less shady, but still just as scummy.