So, basically the thing that appealed to me in Crash Commando was the feature of being able to switch to the background and actually move in depth of the 2d world. Not the way most of you would think at this point, but so that there are kind of two stages next to each other in Z-axis.
Probably the best way to demonstrate this to you is by showing this video, which is too long for demonstration, and tell you to watch the beginning
http://www.youtube.com/watch?v=xEFz1txM6KQ Wait until one minute has passed and you will know what I'm talking about.
I know it's very unlikely that this will be added or even considered because I think it would need a complete rehab for the game engine itself, but I found it that it was an interesting feature and would add some new level of intense action to CTF maps for example.