I had a great time playing this game! As your first-fledged game, you have a lot of promise and I encourage you to continue growing! fixing the grocery part is making the items pop a lot more... going in order was good. Maybe adding a white/yellow glowing outline to the item you have to grab next could help.
Give more opportunity for the antagonist to work with the environment and add more, "being watched" factors... like little notes, a camera flash from the window, and possibly dialogue choices with the shop clerk alerting the lady of recent things happening in the area.
But all around I had a really great time and let me know if you make more :) I would LOVE to play them!
p.s. I did end up finding the milk...