After playing through it twice, one all color one all black, I did it on what I would choose, my choices were
1. Jump Over Pit (seems like good advice)
2. Get statue (Once again good advice, and forgiveness is always a good thing)
3. Travled the upper path (Why go below when above gets me the same result and is much easier)
4. Jumped over Barbs (why kill myself)
5. Moved (I see no reason why not too.)
6. Touched the Statue (Why wouldn't I)
7. Did not Fail
for level 4, position ur ranged units on the lower mountain range, and just use both of them to destroy the spider tanks, keep them there and the spiders will keep going for ur ranged units, ir tanks can now move along the road unmolested