If you jump with a block on another one and release it, it will stick to the block below. Then you can move the bottom block together with the top block. If you jump and for example on the right is a block, if you then release it will stick to that one. That way you can make different connections and constructions! :)
We where debating on ending the game when you lost a block or ending the game when only 1/2 blocks remain. We decided to let it continue since you still could catch atleast one coin most of the time!:) It's true that it's less challenging though! :) We might rework the system in the future where you can get blocks back after a certain amount of coins have been collected.