We're obviously pretty far behind where we said we'd be at this point (2018? yikes), but, progress is still being made on the game. I have a big update in this works, including things like getting this page up to date, our Steam page set up, etc.
I know I haven't been very good posting info here, I'll try and be more proactive about that in 2020. Keep an eye out, I'll have something more official posted soon.
I'm sorry if I've let you down with delays, but I'm glad you're still interested in Puzzle Depot and I'll do my best to make it up to you.
Thanks for reaching out!