add support keyboard controls

[sleep-walker]

When running this application on machines with keyboard and mouse (typically attached to "TV"), it is uncomfortable to use mouse drag&drop actions for every move.

Would that be possible to add also keyboard controls? (Left/Right/Up/Down)

Thanks in advance.

PS: I really appreciate this project and your work on this. Thanks for what you already done. <3

[GfEW]

More than 5 years in, was about to make the same suggestion, although for two other, additional reasons:

1. Keyboard controls are a matter of accessibility. Not everyone can coordinate and perform so many touch-slides wery well, be it due to hardware issues or personal inabilities. Given the proper means though (usually involving some kind of keyboard device), 2048 can be a very interesting game to play - and win!

2. Even on mobile devices, sliding games like 2048 can be played much more fluently and, to speed enthusiasts, more enjoyably, on an external keyboard. With touch-swipes, the 1000ish moves required for a plain 2048 win (let alone higher numbers) are hard to get done in less than 15 min due to the sheer, physical interaction, whilst on a keyboard (e. g. online at https://2048.neiunderscore.com/), 5 min are easily within reach.

These reasons couldn't be more different, but for both, being able to control privacy friendly 2048 with the arrow keys would be a big improvement.

[basxto]

This works. This game can be played with just a keyboard, gamepad or smart TV remote. Apparently it was fixed recently with d0db621, but that could be unrelated to this issue.

The only thing that is missing is proper highlighting of buttons etc. since you never see where your focus unless it’s the menu button or inside the menu. For the game itself highlighting doesn’t matter.

The only tricky part is the tutorial window after the first start, which does work with a keyboard ([<right><right><right>]<tab><enter>) but not with a remote or a gamepad.

The highlighting and tutorial is a general issue for all SecUSo apps and renders other games nearly unplayable (Memory, Battletanks).

Though I guess I better open a new issue for highlighting.