Implement a 2D sliding block puzzle game where blocks with numbers are combined to add their values. The rules are that each turn the player must perform a valid move shifting all tiles in one direction (up, down, left or right). A move is valid when at least one tile can be moved in that direction. When moved against each other tiles with the same number on them combine into one. A new tile with the value of 2 is spawned at the end of each turn if there is an empty spot for it. To win the player must create a tile with the number 2048. The player loses if no valid moves are possible. The name comes from the popular open-source implementation of this game mechanic, 2048.
- "Non-greedy" movement. The tiles that were created by combining other tiles should not be combined again during the same turn (move). That is to say that moving the tile row of
[2][2][2][2]to the right should result in......[4][4]and not.........[8] - "Move direction priority". If more than one variant of combining is possible, move direction shows one that will take effect. For example, moving the tile row of
...[2][2][2]to the right should result in......[2][4]and not......[4][2] - Adding a new tile on a blank space. Most of the time new "2" is to be added and occasionally (10% of the time) - "4"
- Check for valid moves. The player shouldn't be able to skip their turn by trying a move that doesn't change the board.
- Win condition.
- Lose condition.
- The objective of the game is to get the number 2048 using additions of the number two and its multiples.
- You will have a grid of 16 tiles. Two numbers will be given: usually two number twos, maybe number four.
- Move up or down, left or right trying to join two equal numbers.
- When two equal numbers are in touch, they will add up.
- If we are run out of equal numbers on our grid, or we can not put them in touch, the game will provide us another two, a four or even an eight so we can keep on playing. If there are no free tiles on our grid, the game ends.
- By adding numbers, we get higher numbers and we can approach to 2048, which is the goal of the game.