Really fun
These kind of 'tycoon' games are always fun when they're so easily manageable. The gameplay was solid and the controls were simple and easy to understand. There was nothing too complicated about it and you kept simple and efficient. The graphics were good and the sound was very well used.
I do agree that a free play mode would be awesome. I'd love to be able to really get all my stores upgraded to the maximum without playing to the last level or something (is it even possible then?) and just see the money roll in. That's the fun bit.
Almost every level, I was bound to make the target on the very last day. Almost seems like it's planned that way. Which can be fun.
But I think the starting of each level was a little tiresome. I think what you can do is have an 'overflow' of cash instead of starting with 5050 all the time. Instead of cutting it off after 100% is reached, why not let the day play out and see how much cash I accumulate at the end of the level and take a percentage of that to carry over to the next. That way it would give the game a different dimension and it wouldn't just be about spending, it would be about spending wisely.
I do like the different timings you gave every store. Certain stores were higher priced but customers spent ages in there. It made subtle strategic nuances when placing shops. But because each level basically starts exactly the same, and has the same choices to be made, it becomes repetitive.
Another small thing you could add as a bonus would be small little extra 'situations' during the game. A message could come up with 'Competitor set up shop down the road. Reduce prices by 20% to compete?' and you'd have a choice to do that or not. Or maybe a 'sale' button or something where you reduce prices but increase customer flow. Or like 'winter time!' where the boutique charges extra or something.
This is a solid little game, albeit a little repetitive after a while. Some of these extra touches would help eliminate them so you might want to think about adding some extras. Good job.