Nice to see a time table - sticking to them is always the hard part, of course, but keep at it :D
What about the challenges of making the monsters/bosses? Do you have any music selections for the levels? Winging it has its advantages of course, but do you ever have to go back and fix things because you map yourself into a corner? (Happens a lot, haha.) We recommend expanding your blog posts to elaborate on your development process!