I'm working on the port of Xump for the lynx and at the moment I have a working alpha with one level and without music/sfx.
The first working build had about 4 FPS during gameplay. Optimizing the code I reached steady 7 FPS. Now I'm moving things in a cart filesystem to load title screen and menu backgrounds only when needed, so I can have other memory to make more optimizazions. I think I can reach about 10 FPS, but no more, mostly because to maintain the original level fomat I have to use small 8x7 px tiles.
Kojote, the Retroguru team leader, thinks this is a too low FPS for an official release, but it seems to me that some commercial games have worst FPS.
What do you think about this? Is it worth to continue the project with such a performance limit?