Based on user feedback, we've made a few adjustments:

- Added Bubble Icons switch to settings (default is off) to help address colour perception difficulties.
- Added Invert Keys switch to settings (default is off) for keyboard controls.
- Added Key Sensitivity slider to settings.
- Escape key no longer quits; pauses and unpauses in-game, goes back a level within menus.
- Added Settings option to pause menu.