This is a simple yet fun little game, and I enjoyed it a lot! I like the art style and the adorable cats a lot. The gameplay loop is simple but effective. The three coffee recipes are easy to understand and do, and really bring a nice balance of being busy running across the working area, and still being able to serve customers with relative ease. Nice job!
For some criticism I'd say the rate where customers spawned is a bit too quick, and with the relative long peperation time for each cup of coffee, some customers are bounded to be missed. Maybe it's a skill issue, but I don't think it's possible to do all customers, and that's not a good feeling. Perhaps you should leave a bit more delay between customers, which would make the game feel better to play. I would also suggest putting the recipe somewhere in the game and possibly making it always visible on-screen. This is probably one of the most important information the player needs, and it's a bit odd that it's just there as a screenshot.
Anyway, this is still a very nice entry! You should be proud of yourself making this game!