Nice update, especially the level of detail in the fixes.
If I was testing this build, I’d focus on:
- save/load consistency, particularly restoring mid-run state correctly after the fixes
- achievement tracking across full runs and multiple sessions
- physics behaviour at 1.5x and 2x speeds, especially after the split ball changes
- options persistence (speed, display mode, audio) across relaunches and scene transitions
- UI layering after the options panel rebuild to make sure it can’t be blocked again
The save/load and speed-related physics changes feel like the highest risk areas, since they can introduce issues that only show up after longer play sessions.