Hello!
Thanks for Clicking On My Post! 
I Am Stuck Here, On my Game Having No Idea what to Add to Make the Game More
Fun And Enjoyable.
Its A Sandbox Building Game
In which Players Can Build anything That they Can Imagine.
Some Images of The Game :
Please Suggest Me Some Ideas If you Can Come Up with Any,
Thanks For Reading!
Well, I think that your game is pretty cool. You could add: 1) A tutorial so players get to know the game more 2) A daily reward 3) Special offers that expire after a period of time 4) Special perks that are unlocked when you buy a title 5) A special building tool when you win a building match 6) You could make a kind of library where a player could get ideas for some custom buildings
It might be a lot of work but possibly make new blocks that can function like motors or like pistons. (Got the idea from MC 
)
As a sandbox game it needs to be easy for a lot of players understand so maybe a guide or maybe a thing that flashes in the side with tips, other than that the game looks fun!
Possibly make it so the texture on the ground lines up with the creation you make.