Sure!
I'm currently kinda on a sabbatical of sorts, so I won't go back to my "official" job (I'm a software engineer) until next year. So I have a lot of time in my hands, and I've been using a ton of it on honing my game dev skills.
On this game, I worked about 8-9 hours a day give or take, I missed a couple of days but on the last day I worked like 15h.