Personally I was very happy about how the challenge modes for these two levels played out. After playing both of them on hard difficulty, I can tell you beach tiger beetle larvae make a huge difference. Basically they just chip away at your ants, draining your food and food gathering capability. Even with a large army, it takes a decent amount of micro and time to bring down a group of the larvae, and it makes growing a colony much slower. I thought it was a good bump up in difficulty higher in comparison to 1.1 and 1.2 challenge modes.