9x9 Review Requested (19k)

I’d like a review of this game that I lost as white. Seemed like no matter what I did I was reacting to my opponent as he surrounded me. Yet as I walk through the moves, I’m not seeing where I should have moved differently. Maybe C6 instead of C5 for move 14. At what point do you think I messed up and what alternative moves would you recommend?

Thanks!