Thanks for playing and apologies for the confusion!!
The ants were the enemies. The player only is losing body parts when the ants walk into them as they have more hp than the ants. We had meant to add specialised sound effects and visuals to show when the ants or the worm were attacking but we did not manage to get these ready in time sadly.
The ants change themselves to food as we wanted to make an "XP drop" for when the players killed something which it does. We also meant to make additional body part sprites to set them apart from the normal food and to show that it was the ants being killed that dropped them, but once again we did not get to that due to time constraints. Apologies again for the confusion I hope that explanation helped.