What you have so far is really incredible, especially in the visual department. The levels, while fairly short, have just enough action and a good amount of non-linearity to keep them from ever becoming boring. What should really be your focus if you want to get a streak of 10s like you keep wishing for, should be having a wide range of different environments, yet having them all connect together strongly through a story line, instead of them being only loosely connected, like the epic levels for example.

Maybe some epic boss arenas would be awesome too. ;0