That's a misunderstanding then. The "would have fared better" gave, from my point of view, a clear impression that it's sales what you were referring to (it's also past tense).
I do know about the game and I do know about the bad reputation it has, especially among fans of the franchise who got utterly disappointed.
I can see how you might get confused from just reading the news entry. My original comments in the readme were a bit more explicit:
This game has a pretty notorious reputation in Japan, but after playing it a couple of times I can't help but feel a little sympathetic toward Compile. It's not a good game, sure, but I can see how someone could sit down in 1987, draw up the design for this, and think, "Yeah, that'll be interesting." It has some ahead-of-its-time ideas regarding co-op game-play, "open world" design, and even (for better or worse) escort missions. If the areas were a bit less sprawling and the puzzles less obscure and nonsensical -- and the game didn't pretend to have something to do with Touch -- I think it would have fared a lot better.
But yeah, it's a given that if you want your game to turn a profit regardless of quality, stick the name of a popular franchise in front of it. I think this game was intended to be more than just a quick cash-in, though, because some legitimate if misdirected effort was clearly put into the game design -- it has a lot of novel concepts, as opposed to being just another generic licensed platformer, and the staff were apparently proud enough of their work to use their pseudonyms as shop names (see the "Jewler Niitani" in the screenshot, for instance).
My guess is that somebody at Compile came up with this idea for a game, thinking it would be good, and the least financially-risky option for development was to stick the Touch characters into it to make sure it'd sell.
(Incidentally, I'm mystified by the game's title. What "triangle"? What "mystery"? I've played several times and still have no idea.)