It's okay. The first time is difficult, and the second time is extremely difficult. Now I think the strong cannons, the early weapon vault/laser are too much, and I am crazy about planting cannons after Sunshine level 4. The overall difficulty is average, and it is a good way to kill time. I hope to do the second time soon. Chapter 3
It is also possible to swarm lasers when the monsters are not close to each other. This is how we passed the summit of Everest.