Is a Caro-Kann game still advisable after 1. e4 c6 2. g4? For the record, I have already made my move. I am black and I moved 2. ... d5. But I am wondering if that was a mistake. I am a total newb and am trying to learn the Caro-Kann. As I understand it, after 1. e4 c6, black should play d5 regardless of white's response. However, I have not found any analysis on 2. g4.  Was my decision to go 2. ... d5 a mistake?  Is this still a Caro-Kann game or is it something else now?

Thanks!
The g4  line is called the Spike Variation of the Caro-Kannn(B10). Commonly played line is 2...d5 with e5 there after. White gives up development of pieces for more spatial control.