Version 2.2.1 is now available.

Version 2.2.1 contains no changes to the core NES ROM file, which is still version 2.2 (so the game itself is still exactly the same), but it does contain some improvements to my emulation wrapper.

1. The issue where the audio would sound very glitchy if the monitor refresh rate was below 60 Hz has been fixed.

2. The issue where, if you clicked and dragged the window, it would cause the audio to lag behind the video has been fixed.

3. The Esc, Pause/Break, and Home keys now have to be held down for about 1.5 seconds to perform their respective functions (exiting the game, resetting the game, and resetting all key/button mappings to default values respectively). I had heard reports of people accidentally hitting Esc or Pause/Break and not understanding why the game immediately closed or reset. This change gives a little wiggle room for accidents.