I posted this in the lynx programming sub forum but actually I would much rather see if this looks ok for you from the users perspective
After quite some helpful introduction to the Lynx by Sage, Heaven, Bernd, Luchs and all those that contributed with docs,
I started a little game project myself. That will progress slow as other ongoing projects require my spare time but I wrote
a new 'full color' mode that allows 16 colors per scanline without interlace which is why it also works very neat on modded LCDs or in emulators.
I can provide more information or converters later but here are some examples:
This mode uses a respectable part of the rastertime so you can not easily use sprites with that.
Certainly not with the simple swinger in its current set up
The image size is comparably small. Less than 30 KB for the landscape picture that uses 475 colors actually.