I picked it up because of your recommendation in the Wonderswan thread - I've only played it for about three hours yet and need to figure out a lot of stuff about how it works. But yeah, it's fun, even though I can't read any Japanese
Don't worry about the Japanese. The cards all have numbers, attack power and so on, also the characters are pretty easy to identify 'cause some of the characters (Kanji) have arrows on them which mean they're linkers, kinda like a combo card of sorts. It's all about luck too but you can get a hang of the rotating method and aim for your best card. You can also edit your deck, if you mess around with the options you'll figure it out. I was lucky it all clicked with me, I never managed to get a guide for it, I got the game eons ago when the wonderswan was still a new thing so there wasn't any guides back then
...lol.
Travelling along the planes it's pretty easy too, just keep going right...north sometimes but mostly right.
Great toilette therapy on that one...should dust it off and start playing it again...great dumps ahead.
Edit: The Guilty Gear Petit games are also great, so is Megaman & Forte, it uses trhe screen both ways. As for GG Petit games, well they're great if you can get used to that damn D-Pad or if your games come with the "coin" that helps too.
Edit 2: GGP2 plays way better on the commands, way more forgiving.