Like other comments at the start I was always on negative food really quickly but after 3 restarts I understand that bugs what are not white was not mine but enemies !
And after that I make a warrior + a clean room, and it's become a way more fun ^^
So maybe that just one indication is missing that the not-white bugs are enemies.
But it's a very good game, very nice, with very interesting mechanics!
Well done ! ;)