16 Winged ants is too much for the second colony as the game is currently. Consider adding upgrades to increase production or decrease cost. Upgrading queens, for example, to allow more larva production or to make more from eating food would go a very long way. The game is very boring getting to the next colony.
Great game. Clearly unfinished, though.
Suggestion: I would like to see a free-play mode. Just a big grid with no time limit. There's no reason to play again after you've "completed" it as it is.
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We have fixed it with the last release, we are working for more colonies...