There's the OEM - 1.0h, not 1.0, which has slightly different graphic for the jungle and diamondus set, slightly different music (avaliable for dl on LoriCentral), different textured-background implementation, blade gun and the fireball-gun replacing the pepper and electric-blaster, as well as numerous menu-differences and no MP afai recall.

Then there's 1.20, 1.21, 1.22, 1.23, 1.23x (HH98), 1.24, 1.24x (CC I think)