The 1.4 update for Square Off is now live on the marketplace and is available for both the paid and FREE versions of the game. The update has increased the performance of the game significantly and also added support for fast resume.
We have another update in the works already with a much requested feature, but it is still early days and I would prefer to keep it a surprise 
Thank you all for your marketplace reviews which have been overwhelmingly positive (click here to see reviews and comments from our many users around the world). The free version is really taking off and quickly climbing to the top of the free games category.