I too spent ages trying to get through the
raven game to get the
antidote then came up with a plan.
Every time I won I saved the
game before starting the
next one - all easy I may add as I am no chess or draughts player!
If I lost and had to re-set I went back to the
last saved game and just kept selecting until a game appeared with more crows (with high numbers on) than snakes.
Managed to get to 2000 points after about 6 games.