The games needs about 130 MIPS in the emulation. If it runs at that speed you have to adjust the frame rate in the dropdown menu. But the main problem is the ke

The games needs about 130 MIPS in the emulation. If it runs at that speed you have to adjust the frame rate in the dropdown menu. But the main problem is the keyboard emulation. Frontier needs the shift key to slowdown the spaceship. And there is no way in JavaScript to get the keydown and keyup events for this key.