Glad I could help! :) I played it again and I came up with two other possible suggestions :)
1) Maybe the player could choose where to start out from? The level is a smallish size right now so it isn't super important just yet, but if you choose to make bigger levels in the future, you could let the player choose where to start so they can plan their approach (almost like in the Hitman games haha)
2) I think maybe consider making the trees more valuable. At the moment, they take a decent amount of time to eat but only give you one locust. Meanwhile, the wheat seems pretty quick and you can get tons of locusts out of it. If trees were a bit stronger, they could be a valuable place to start to build a swarm and then you could take that swarm over to the wheat to really start building quickly
That's all I got! Hopefully that is helpful :) The game is really neat and I'm looking forward to seeing where you take it! :)