I really liked this and enjoyed the sounds too. I agree with Khao about having time with the sounds. It might be an idea to have the letterblocks hover at the top and you have to type them to make them fall. That way they would repeat for several cycles and you could choose how to mix short and long sounds in the same scape. You would be choosing the timing not just of letters but also between blocks. Perhaps there could be a penalty if you get a backlog at top (like muting sounds that are falling). Very cool.