Very cool and well polished! I loved all the little touches like the different weapons and the various enemies. The idea of moving the camera with the scroll wheel was super cool, I have never seen that, although I found I did not use it. My only complaint is that it felt a little tedious walking back and forth to your base collecting resources. Towards the end, I just ignored gathering more food and had more fun. Maybe this part could be automated at the cost of not having as big of an ant army for a little bit but still allowing you to explore.
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I was originally going to have the ants go back to the anthill on their own, like in Pikmin. But I didn't really feel like I had the time to make a proper pathfinding system, so I just decided to have them follow you. The ants can move quite fast when you put extra ants on the item they're carrying (even if the item has a weight of 5 you can keep putting more on to make them go faster), but I agree that it still is quite tedious.
Also, if you get all of the food you fight the boss at the end (if you didn't know).