Bug reports, critical problems in the game or site not related to your own code
@shedletsky devicePixelRatio=1.1 means you have 110% scale in your browser settings. Better to make it 100% since our engine cannot guarantee precise sprite rendering with floating point devicePixelRatio, best results are with 1, 2, 3, etc.
the database file is just a json file .. you can try to fix it but it most probably is corrupted somehow that you will loose your data... I think the logfile tells you where the problem in the json file is.
I know it won't help you with the old file but you should do backups of the file or use a mod like screepsmod-mongo that uses a real database.
the included "database" always dumps the whole data when saving it .. so it is not very performant or safe for much data.
Text is particularly blurry (room.visual.text) at certain zoom levels that were otherwise readable in the old renderer. Unsure if the new lighting is a factor or not, I don't recall text readability issues previously.
Overall runs great. Would really like a checkbox to turn off lighting effects.