Hi there, first of all you need to download this game( https://play.google.com/store/apps/details?id=com.puzzle.miniworld ) , because our game similar to this game.
The game should look like this pictures and the game should be simple, we will give you 3D objects. Also, the UI part can be simple it doesn`t necessary to be perfect.
This is introductory part;
Levels part. The levels should be placed like in this pictures. As you can see from the picture, levels are placed like this and they should not be opened until the previous level is over and here the tasks which are comleted, are colored and others which do not open, are not colored and you need to do like this. You also need to do this with different backgrounds as you can see. There should also be a loading panel when moving from stage to stage;
Main part. Do not open the next level until the 3D model is fully assembled. Also backgrounds should be different to each models
Like this and the time task is done the shortest time
Instead this you should add how much time take to complete task