Alrighty, I just played through the new version. The main problem it has is serious software mode renderer errors because of a lack of one-sided linedefs. There is also a lot of falling from high areas and having to do stuff over again, which is really annoying. For early efforts, though, they're not bad at all. Keep it up, and look at other people's work to see how to do 1-sided linedefs properly with the level design.