- Use only non-emoji symbols for HTML buttons.
- Make background music volume louder.
- Control music volume using a dynamics compressor node.
- Shift notes an octave higher to make them audible on all speakers.
- Increase the difficulty levels in a more gradual manner.
- Levels 1 to 1000 that keep looping indefinitely.
- Background music based on C major scale.
- Collision sounds based on C major scale.
- Resize canvas as per browser dimensions.
- HTML buttons for playing on devices with touchscreens.
- Rudimentary support for playing on small screen devices.
- Key and button to restart game.
- Key and button to pause/unpause game.
- Key and button to mute/unmute audio.
- Key to enter/exit fullscreen mode.
- Version and copyright screen before restarting game.