I must have missed a crab somewhere because I only had 4/5 at the end, but I finished it! Had trouble jumping from the Level 3 area to the platform above it for some reason... until I suddenly stopped having trouble doing it. (And, as someone else said, the spike hit boxes were somewhat unforgiving, which was really only a major issue in the Tiger Shark level). That "final battle" threw me entirely off, and it took me a few tries (and some guesswork) to get through it, but it was a nice change of pace from the frankly-stressful Tiger Shark level. :D All in all, fun!