
White must react:
a) 3. exd5 Nf6 is a sort of scandinavian where white has extra move of f4 and black has
extra move g6. I'd say g6 is much more logical move in that opening than f4, so black should be okay.
b) 3. e5 c5 is funny french type position. Of course g6 is ugly move in that position,
but so are quick f4 and e5.
Black has a good control of center and because e6 hasn't been played the problematic c8 french-bishop
can be played at g4 (or f5) before playing e6. Nc6, Ng8 - h6 - f5 or Ng8-e7-f5, Qd8-b6, 0-0, speculating with
d5-d4 should give black plenty of counter-play. Of course white also has his chances and if he black enables
him to play c2-c3, d2-d4, Bf1-d3, 0-0 without getting counter-play, white has a big advantage (white french dream).
I'd say chances are around equal, plenty of play for both colours.