Roguelikes on calculators, roguelikes on handheld consoles, and roguelikes on phones. This pernicious genre has infiltrated almost every electronic device. Now, thanks to the inPulse watch, you can strap a roguelike to your wrist!
A pecularity of the inPulse watch is that it has one button. Fortunately, roguelikes are turn-based, so by entering commands in morse code one can gain the advantage of the whole keyboard.
While traditionaly roguelikes use vi-keys for movement (hjlk), these are awkwared in morse code. I thus went for the shorter keys: mian, where m is left, i is down, a is up, and n is right.
If you are lucky owner of an inPulse watch, this .zip file with the latest version may be of interest to you!
If you'd like something with more depth, and is available on less esoteric platforms (like GBA, DS, PSP, PS3, Wii, iPhone, etc...) I can't help but recommend POWDER.
The original version can be found here.