2-1 is the first level of Cold Cuts.
Difficulty
You have only way to earn three stars. If you know the position, it's not the problem.
Strategy
A consistent strategy for Cold Cuts level 2-1 is to send the Red bird into the top-right icy asteroid. It seems to be the easiest shot that yields three stars
Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-cold-cuts-level-2-1-walkthrough/
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