AGAcoin does not have a wallet for PowerPC-based computers. I think the original developer was hoping to (read thread). The reason would be because of MorphOS, which is an AmigaOS-like computer operating system that only runs on PowerPC. MorphOS is really great for Amiga commuity, but I don't think AGAcoin can make a wallet for it until MorphOS support ARM or x86/x64 CPU. I think the MorphOS team know that Power-PC is becoming a dead-end, and they may port to PC or Arm eventually.

EDIT: AmigaOS 4.x also runs on the PowerPC family of processors.

However, the top priority for AGAcoin should be to update the existing wallet. Unfortunately that's for Linux, Windows, Intel Mac, (not Amiga or PowerPC at this time).