#### Functional
> In order to run and hot reload the app either on emulator or device, follow the [instructions](https://docs.flutter.dev/get-started/test-drive?tab=androidstudio#run-the-app)
###### Does the app run without crashing?
###### Does the game start with a 4x4 grid and 3-4 `tiles` randomly placed?
###### Are those `tiles` valued at either 2 or 4?
###### Can players swipe the `tiles` in any of the four directions, and do they move as far as possible in that direction?
###### Do `tiles` with the same value merge into one `tile` with twice the value when they collide?
###### Is the score updated when `tiles` are merged?
###### Does a new `tile` appear randomly on the board after each move?
###### Are animations used to smoothly move and merge the `tiles`?
###### Does the game stop when no legal moves are possible and does it allow the user to restart?
###### Does the game include a functionality to track and display the current and best scores.
###### Is the current score displayed during gameplay?
###### Is the best score updated if necessary when the game is over?
#### Bonus
###### +Does the game contain a user interface (UI), including buttons for moving "pieces" and displaying scores?
###### +Does the game have difficulty levels or other gameplay options, such as the ability to choose the value of the `tiles` (e.g. 2, 4, 8, etc.) or the size of the board (e.g. 4x4, 5x5, 6x6, etc.).
###### +Does the game have sound effects or background music to enhance the gameplay experience.
###### +Does the game support different devices and screen sizes like tablets or smartphones?
