2-14 3 Birds
Aim first blue bird towards crate below hollow ice square. Split so that top mini-bird hits and breaks ice. Lower birds should take out crate. May have to split pretty close to impact to effect the latter.
Aim second red bird to break crate just below main structure. May take several takes. This is the key to achieving a favorable fallout of main structure.
Arc/Loop third red bird to break open cage at the upper left.
2 Stars: 57,000
3 Stars: 64,000