Nice game.
I have the issue that on my GBA SP (AGS-001) with EZ-Flash Omega the buttons A and B doesent always trigger the sword or jump action. The most times it work but every 5. button presses or so nothing happens.
This problem seems not happen on the mGBA emulator.
With the No$GBA emulator the sword attack doesent work with the A button at all but talking with people with the A button is working.