Reset level when using automatic difficulty

[ChrisysTech]

It would be nice to have an option, to reset the level when using automatic difficulty.
Currently when doing too many mistakes, the level will reset to 1 but go right back to where you've been before, e.g. 8.

If someone wants to start over, there is currently no option to do so (aside from deleting the cache, I guess?)

Also the automatic difficulty could be done in a more sophisticated way, going down only one level after too many mistakes, instead of jumping between levels 1 and MAX_REACHED.

Great project, btw.!