This game was supposedly finished, but then cancelled before it officially released almost 20 years ago.
There was a rumor that the game had been sent to a few cell phone providers and accidentally had been released by a smaller number of those providers for a very brief moment.
A dedicated group was able to track down a phone with the game on it and extract it.
A big shout-out to SGOC (Super Gamer Omega Clank) and Emily for all the work they put into making this available for everyone.
For more platforms, there’s SquirrelJME (itself a fork of J2ME-Loader). You can build it yourself or use the retroarch core.
https://multiphasicapps.net/doc/ckout/readme.mkd