I feel like I didn't play nearly enough of this to form a fair opinion, yet at the same time I feel like I've played way more than I would ever want to. Such is the paradox of the Alpha Zones.
Keith Courage in Alpha Zones is an example of what happens when you take an anime/manga with an established world (in this case the admittedly obscure Majin Eiyuuden Wataru) and try to recontextualize its characters, setting and lore through a very basic video game effigy. You get awful, bizarre products like Dragon Power or Street Combat. It also leads to aberrations like "Kid Ying" and "Doctor Yang". I'm not necessarily some Japanophile purist who insists everyone use "Aerith" and should always switch to the Japanese voice track when applicable, but all the same these games were made objectively worse by trying to separate themselves from their source material for the questionable benefit of a late-80s/early-90s western audience that had yet to encounter anime in any mainstream venue. It doesn't help that Keith Courage isn't a particularly good game either.
Whatever, I've covered dodgy animelicense games for this feature before. I think I can handle an Alpha Zone or two.
What Are Alpha Zones? Like, the Gym? Sports Bars?
Keith Courage in Alpha Zones isn't actually all that bad. It has a very humane game over penalty, a curious system where you can grind during the easier Keith-on-foot stages to buy weapons and power-ups for the mech suit stages and the controls are reasonably responsive. These mech stages have been a little arbitrary so far, since the goal is to head downwards and that requires a lot of "leap of faith" dives into the darkness onto fun things like insta-death spikes and Cthulhu only knows what else. I don't doubt the game will ratchet up on the bullshit-o-meter as it finds innovative ways to make the game even more artificially difficult.
So overall Keith Courage is not terrible, but not exactly a convincing reason to buy a brand new console either. Here's the Kappa to this little adventure: if I want to Beta game, I going to have to be Delta better hand than this. Phi on you, I say! (I Nu, I Nu, these puns are Psi-worthy.)