New challenges should be fixed now. It's being a nightmare with many different small incompatibilities here and there, specially in old browsers. Now I think almost 99% of cases will work and will correctly save the scores.
Remember not to leave the game or pause it, etc... The score won't be saved in those cases.
Plan is to get rid of all old challenges and create new ones using this new platform. The new challenges can be played on mobile, tablet and PC and have much stronger traceability to detect cheaters.
It took much longer than expected for the development of this new platform but it will speedup next challenges development.
jdog you don't even know what his other new challenges are going to be beyond these one :P. however id like LBs to stay since you apparently cant cheat in that anyways
I actually like the new games but for some reason Find Me works great on my phone but I just tried playing it on my computer and it didn't load after I pressed start.