Well done. Blocks are easy to place, rotate and stack. Undo is a great feature to have. Tons of colors and sizes of blocks to choose from. There are several slots to save you creations in, so when you let your friends play they can start fresh and you can come back to what you were working on later. The camera gets "turned around" sometimes, making scroll around a bit tricky at times. But overall, very nice app especially for a first version. Im hoping there will be regular updates, with more bits added over time. Id really like to see a bigger "sandbox" to play in, and the ability to stack lots higher than 6 bricks. Would be nice to be able to group pieces too, though that might be tricky. I own a few apps from this developer. All are a great value for the price with good updates on a regular basis.