Talk:Game Development Based on Experience/1.4.3/@comment-137.30.253.52-20130505184958/@comment-96.53.201.142-20130506112521

the percentages appear when the time devoted to that part of your game isn't enough to complete the features. So if you add more engine features, and engine starts showing a percentage, then you need to increase the engine slider so they get more time to finish those features you just added. Or you could remove some features so they don't have as much to try and get done.