This game has such massive potential! and i mean massive!! Its unique in its own little way. Some suggestions
* More activities, like swimming, sports. Add like a pool option along with basketball courts ect to expand Rec Centers.
* add hobbies! Def add in hobbies for the tiny's art, crafting fishing ect to increase their happiness.
* Crime and law!
*more lot types like a night club with dancing for example. Actual school for kids
* maybe add skill classes to improve skills.

of course some suggestions. This game has such potential and it can go into any direction! Keep up the great work