Really well done for a 4 day jam. I LOVE the art style its so cute.
I'm not sure if you are aware, but there is another game with exactly the same gameplay loop called Coal LLC. This isn't a dig (no pun intended) at your game, just thought you may be interested to know in case you want to continue this game further so you have a point of reference.
And don't let this dissuade you, I say this because I've been developing a similar game over the last 6 months as well so I've been looking for other games like it.
I will say that I personally find the timer + quota combo a bit too stressful for my liking, but there are a lot of people who enjoy Coal LLC so I don't think I'm really your target audience.
Good luck!