Solution

[radioactivity]

I've tried to do that with robots available in missions. Unfortunately basically everything goes to hell on Tropica

Why? It's just a planet like the others.

Because Me cannot be programmed without cheating, so you can't beat missions 3.1 and 3.2 by only programming.

Nope, I always skip these. 3.3 is an immeasurable leap in difficulty. You suddenly have to program medium-sized base building, program shooters to hunt ants with stalks in mind and the terrain itself is just *cut* brutal.