I had the ?'s problem in VBA also... I thought I had to tinker with the real-time clock option at first, but that didn't help, so I tinkered with the .sav in a hex editor for a bit, with not much results.
After a while I just got sick of it and I just put FF for every single byte and saved it, started VBA again and suddenly small group of the ?'s were playable, and i was allowed to progress to the next question mark after i had solved the previous number.
The specific ones were the ones u get to by selecting the upper left menu twice.
I also noticed in the config menu:
- game brightness / color scheme at the second selection
- sound and music turned on
- 4 available block designs instead of just the default one
- 4 avaiable cursor color sets instead of just the default one
As you progress through the normal game that section with the percents begins to fill up.