I had fun playing it, at some moment, it was pretty difficult (especially the level before the last one), but it was still winnable ^^

Watch out though, at some moments there are some fruits that cannot be eaten  because trying to eat it with either snake would cause the other to die (like if snake A is spawed at (m, n) and snake B is spawned at (m+i, m+j), you cannot eat any fruit on the upper left rectangle of a height of i and a length of j)

I don't know if my explanation is clear though x) 

Anyway, I enjoyed the game,  keep at it !