After Ustwo Games released a $2 expansion for its premium mobile game, Monument Valley , angry players gave the game 1-star reviews on Apple and Android app stores. Now, the developers have shared their thoughts on Twitter.

"Seems quite a few people have gone back and 1-star reviewed Monument Valley upon update because the expansion was paid. This makes us sad."

"That's it, we're giving up the premium game. Next time we're just going to sell you 500 coins for $2 instead."

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A follow-up tweet took a shot at the common microtransaction-based payment model often seen in the mobile realm.After tweeting about the negative reviews, Ustwo's followers flooded app marketplaces with 5-star reviews to outweigh the poor ones."We saw a vocal minority early on, but if you check back at the store page now you can see that [the negative reviews] have been hugely outnumbered by more positive reviews," Ustwo director Neil McFarland told Gamasutra The expansion, Forgotten Shores, includes eight new chapters for Monument Valley. We included the base game in our list of the Top 25 iPhone and iPad Games , praising its simplistic beauty and its creative, Escher-like puzzles.

Brian is an associate editor at IGN. You can follow him @albinoalbert on Twitter