Looks solid for a first iteration! It’s a great start, though it feels a bit predictable at the moment. To spice things up, you could add more variety to the gameplay.
For example, maybe customers could have an irritation timer and leave if they wait too long? Also, upgrading machines feels a bit too simple. Instead of just clicking 'upgrade', maybe we could sell old ones and buy new models with different specs? You could introduce 'clothing tiers' – better clothes pay more, but require better machines. This way, players would have to strategically optimize their shop to handle more demanding (and impatient!) customers.
Anyway, great job on your first game! Keep going!