Expand out, that's a good starting tower, add a wall, connect it to another tower, make an enclosed area, make a much bigger keep. Uh, also, the top looks kinda funny, maybe if you expanded the blocks in the top row out one block it'd look more natural. But apart from that, it looks good!
nice castle lol
cool castle i really need to get into minecraft sometime!
how long did it take you to make it?