I tried as far as I could

... I just finished the third delivery level and started looking for aluminum, so far so good, but I can't deal with the spiders anymore, it's not possible anymore. I got anxious every time I opened the game, I wasn't enjoying it anymore so I went to peaceful mode... as the experience for me changed, it became another game, more enjoyable. The other animals weren't a problem, regardless of their size but the spiders won :-)