I do not see any option to end a solo game prematurely.
[FIXED] Solo Game Unendable
Posts 4 | Views 739
Also on the same game, auto play does not seem to be functioning.
One will be a new feature.
The other is a bug fix.
Both are on our list.
Players are now able to cancel (solo only) games even if they have already started.
Please refresh your browser to see it.