The title screen pixel cup animation was cute but a little blurry? And the logo would have benefitted from being in a more pixelated font to match the graphics on the screen but that is purely an artistic choice and preference. I thought having some tutorial text in the settings menu to be kind of strange. When choosing between calm mode and story mode, the highlight on the buttons is very minimal I could hardly tell which option I was choosing.
The newpaper bit was nice! The art could use some polish and there is a typo in recipes(?), though it might be intentional. I like the coffee serving mechanic, it follows other games of the similar genre. Though when I first got into the shop I already had an orange haired female customer who I couldn't talk to to get her order so I served her an empty cup and then the next customer I was able to interact with. This could have been a nice way to introduce mechanics in a sort of "tutorial customer" Interweaving murder mystery and coffee serving is cool! Though the inclusion of murder kind of takes the cozy out of this as it could put some players on edge that the killer could be ordering a tea from them. I was a bit confused on controls and think this would benefit from a small explanation in the itch page. I didn't really figure out how to make drinks that had more than one ingredient because they don't seem to be mixing or interacting at all to the player. I would click on the objects and they would make sounds and animate but I clicked on them after, tried to drag, nothing happened and when just clicking serve at that point, the customers didn't get their correct drinks. it would be nice to have some indication that the cup has liquid in it like when pouring the tea, coffee, etc.
There was a point in story mode where one woman with a big orange afro appeared and I clicked on her and then she left screen and her text bubble flashed quickly.