Well from the looks of it he likely decided to redo all the skeches before continuing and so we won't see any progress before that is done. He is probably gonna take down the old demo then and release the new one with new art with the new one, likely hoping it will help him draw in more people. Then after that is done he will begin development on the rest of the game. How long this will take, I don't know, I've not followed this dude for long enough to gauge how quickly he works but I do think this is the intent behind what he is doing now.