how come earth defense force runs bad on android

[fivefeet8]

There could be an emulation bug that needs to be fixed for the game. Or an option that needs to be enabled/disabled. I don't have the game so can't test, but you could set everything back to default and see if that resolves it. Then disable/enable once option at a time to see if it helps. Other than that, you'll need to wait for an update to the emulator.