Reworking the Atari 2600 Adventure maze

I need to rebuild the crate maze so it is lit better and matches the proportions of the Atari 2600 Adventure maze.

With a bit of cut & pasting, this is the layout of the Adventure Maze. The only thing different is the connection from the green area into the maze.

I am contemplating abandoning the crates in favor of walls and floor that match the exact color of the aventure maze. I need to see if that looks good and isn't a performance hog.

Maze images courtesy of:
http://nerdtrek.com/retro-gaming-adventure-atari-2600/