Garbage game! It's very fun and probably quite addicting if you're quickly addicted to these types of games. But there's so much clicking as quickly as you can that it becomes really stressful quite quickly and without any moments of rest. Then if you mess up the fixing of the machine, usually by missing one of the tasks and having to start all over, you're immediately screwed. The pace is a bit quick, and you can always play faster, but the mechanics feel solid and are well rounded. The discard feature is nice. It's a bit weird how you can't serve the second customer before the first, if you want.
The main thing it's missing is any interesting choices, in other words, you never have to think. For a game that doesn't have that I think you're game does it pretty well. However I personally like having to do a bit of thinking while playing a game. Currently you just follow the script for each customer in order and fix the machine when it's broken. To add an interesting choice to this game you could for example make the dispenser slower the more broken it is. You can fix it at any time to be top speed again, but if you fix it immediately you're fixing more than you're making ice cream. Now the player has to decide when it is worth it to fix the machine, which takes practice and is fun.
To summarize the good points, it's very polished and feels solid, it's very stressful fixing the machine while the customers are awaiting their ice cream, there's no speed limit meaning that good skill is rewarded, the sounds that do exist feel coherent and are in a similar style, I love it when you're trying to make a three of a kind cone and it breaks just before then and it goes: "pdl..pdl..pdl" very satisfying, I like the mood change when switching to fix mode, I love the way you show how mad people are getting very effectively, I like how you didn't go overboard with the complexity of how to make an ice cream cone: keeps the quick pace in the game and I like the color selection of the ice cream types: very distinct. The rest of the game is kinda mid, tbh
Overall a really strong entry, good job!