The current plan is to have completely different views for each level; that’s easier to understand & easier to implement. E.g., /projects/1?level=0 would should the current “passing” level, while /projects/1?level=1 would show “passing+1” level. The LF will have to bikeshed what they want “passing+1” actually named, but I’m expecting some sort of metal theme (silver/gold, gold/platinum, or whatever).
We also intend to internationalize the software (so that others can localize it), per #739: