What a kind comment! Thank you! It always means a lot when anybody plays my games, so thank you for playing more than one and taking the time to comment! I do my best to keep it reasonably original, even if otherwise it's pretty shallow most of the time.
I think actually I've been doing it slightly longer than five years - the very oldest games are not on itch.io. But even if it's less than five I do still plan to stop in early 2020, I just haven't decided yet which month will be the last!
Edit: no, it's just a bit over five years consistently, though I've tried doing games before the start of the consistent one-game-a-month streak which is 5 years as of January I think.