Game version quoted above out of date. Can't get to data when screen frozen.
This well known problem still happens, unpredictably and not reproducible.
The background screen is not frozen - the small oscillating icons are still moving up and down
Right clicking on any icon just gives a small...
3 screenshots:
#1 266 points shown, 6 trowels available
#2 266 points shown, 3 trowels available. One trowel and two tombstones available to be collected
#3 266 points shown. 4 trowels now available, tombstones claimed but no increase in points.