The atmosphere was spot on, and the game is cute and intuitive. I only didn't get why in the end you collect 140 coins if you don't really need the 100 to enter your house, but maybe I should play it again and find out ;)
Also, how it was to work with pico-8? I usually don't like game engines, but this one looks like fun, especially for a challenge!
Mostly, it's in case you decide you want to open the 100 coin gate near the beginning. There's no Easter Egg to backtracking, but now I wish I had made one. As for PICO-8, I thoroughly enjoyed it! It has semi-realistic 8-bit constraints and lots of helpful resources that made getting into it pretty easy. TIC-80 is another very similar engine that I also considered using.
