Also, the tiles don't move in the way I think they should from pressing the arrow keys. Try it.

(Great job though!)

Is this free software?

It's a bit slow for larger grids (20x20).
It could be improved by avoiding $(command), which creates a subshell. Most importantly within tight loops.

Example of performance improvement:

182 function apply_push {
183   printf "\n\ninput: $1 key\n" >&3
184   declare -i i=0
185   while [ $i -le $index_max ]; do
186     declare -i j=0
187     while [ $j -le $index_max ]; do
188       flag_skip=0
189       let increment_max=index_max-j
190       declare -i k=1
191       while [ $k -le $increment_max ]; do
192         let flag_skip && break
193         push_pieces $i $j $k $1 $2
194         k=$k+1
195       done~
196       j=$j+1
197     done
198     i=$i+1
199   done

It doesn't work using
curl -s https://raw.githubusercontent.com/mydzor/bash2048/master/bash2048.sh | bash
or
curl -s https://raw.githubusercontent.com/mydzor/bash2048/master/bash2048.sh | sponge | bash

Attached is a patch that adds a score to the game.
It also replaces all occureces of "echo" with printf for compatibility and adds a trap handler for SIGINT wich calls "end_game()"

Please, I want to upload it to Fedora Repository, Could you please a Open SOurce license..
https://fedoraproject.org/wiki/Licensing:Main?rd=Licensing

after you win the game , the console print game over too
it is really cool , I enjoyed so much playing the game :)

In Ubuntu, when the target is reached or there are no moves, the terminal just exits. There's not time to look at the text echoed!

Hi,

I thought it'd be cool if the user can see/save his highscores. What do you think of this feature?
I could eventually open a PR if you feel it is interesting.

Regards

I think I did pretty well

the script closes instantly when the game is lost

Bash 2048 v1.1 (https://github.com/mydzor/bash2048) pieces=14 target=1048576 score=211020

/------+------+------+------+------\
|      |    2 |      |      |      |
|------+------+------+------+------|
|    2 |   64 |      |      |      |
|------+------+------+------+------|
|   16 |    4 |    4 |      |      |
|------+------+------+------+------|
|   64 |   16 |    8 |    2 |      |
|------+------+------+------+------|
| 16384 |    4 |   64 |    8 |      |
\------+------+------+------+------/

If you allow large targets, you should adapt the cell width

Might have to do with combining them, moving up and to the right.

Otherwise, neat.

Do you remember the old(er) games that displayed how long you played the game in the end screen?

Would be nice if bash2048 would show the play time at the end screen (Game Over and Win).

As it is now, it is hard to distinguish an 8 from a 4 or a 16 from a 64 since they're all of the same colour.

Very cool command-line version!

The board appears like this:
`
/------|------|------|------\