While developing Wool, we were measuring the time we spent working on each game part. We think it will be useful to us to help estimate better our future project development times, and the effort needed in each part of it.
As you can see, most of the time spent went to Betatest, Level design and Graphics Art. The only thing unexpected here was the time spent developing each level. Despite having an editor that allowed us to design one complete level from scratch in around 15 minutes, the whole process took around 1.3 hours per level (Not including playtest). That is due to level redesigns, subtle modifcations, difficulty tuning, etc.