Good idea ;-) !
Awesome! Glad to hear you are considering it :)
If possible, can you make it compatible with the Duke Nukem 3D: 20th Anniversary World Tour version on Steam?
I'm only suggesting that one since it seems to be the only currently available way to purchase Duke Nukem in the modern age (Other than GOG :P)
Also another suggestion (but perhaps a much much tougher one unfortunately) is that it would be nice to have Linux support especially for the Steam deck, this (And the Doom one) would be the perfect launchers for it ^^
You can also purchase Duke3D from ZOOM
https://www.zoom-platform.com/product/duke-nukem-3d-atomic-edition