Hey, awesome! I made the same thing for Assault Cube, but I was thinking of recreating it in Red Eclipse.
Glad I don't have to. :P

I would suggest recreating the tunnels to match that of the original arcade's sprites. The official arcade map look like this.
I personally aimed to make the mini-map look as close to this as possible, but you can do whatever you want.
You could also use some custom 1*1 textures to colour the map. The official colours used in Pac-Man arcade game are:
0R,0B,0G (000000) = Ground
40R,44B,231G (282CE7) = Walls
255R,193B,230G (FFC1E6) = Ghost Gate
I'd also suggest making the wrap-around tunnel teleport to either side, if you haven't done so already.
Also, I would put pickups in each corner where the power pellet would be. Again, you can do whatever you want though.

You can check out my version here.

7/10