Sadly, controlling your mutant is more complicated than it should be. A simple combo (well, the only combo in the game) seems to require odd timing for each character. Cyclops, for example, will throw out the same stiff punch animation every time unless you jam
on that A button; on the other hand, Storm always performs a full combo with a few casual taps. Strangely, Rage Attacks (performed by simply pressing the L button) only come out half the time they're supposed to, proving quite an annoying little bug when you're surrounded by Acolytes and wondering if your buttons are malfunctioning.
Yes, Reign of Apocalypse is full of little problems that point to an almost amateurish job of programming. Perhaps the weirdest (although sometimes amusing) could be the uncanny ability to 'juggle' defeated enemies across the screen as they bounce into the air after every punch, screaming the same monotonous death sound each time. With the right timing, Rogue can pop a dead Ranger five or six times before he flies off the screen for good. It's tough to imagine stuff like this getting past a trained quality assurance team, but it apparently happens.
Here's the bottom line: you want gameplay like the old X-Men coin-op on your GBA, but you won't find it here. Think back a decade or so... has Capcom ever let you down? Exactly. Do the industry a favor and pick up Final Fight One for a clearly superior experience, albeit a much, much older one.