If PinballX crashes and you lose your mouse pointer, the best approach is to attempt relaunching PinballX and then close it properly. To accomplish this using only your keyboard, proceed with the following three steps.
Step 1: Open search bar
Press the Windows Key
Step 2: Launch PinballX
Type 'PinballX' (without the quotes) and press enter
Step 3: Close PinballX
Press ALT-F4 to close PinballX sucessfully
If PinballX is still crashing, or your mouse