I find grabbing objects from the floor and getting chopped wood into the chest a little difficult to do.
On my first play-through, I didn't get very far as I was still figuring out what I had to do in order to survive. Second play through, I was one rock short and died. Third play through, finally built the tower but didn't make it to the very top since the Tsunami got me. Fourth play through, I barely made it on time.
Though I think it needs a bit more tweaking, I had fun. Great job!