Maybe it can have some sort of journal which the player fill as they progress in the game.The journal is a temporary name and is like a placeholder.Suggestions can be made on a suitable name.
The journal would have the enemies encounters page with the enemies and their respective weapon strength and weakness as well as a weapons page which states each weapon obtained and the respective strength and weaknesses of the weapon.There would be information about each enemy and weapon.
The only way to determine the strength and weaknesses of each weapon and enemies is to use it on everything thus by learning by trial and error.After each mission the journal will be updated with new information once it is new and each mission is completed.
Also the journal would give the number of enemies encountered/killed and the number of times a specific weapon been collected.
This is long and cool idea that would be hard to implement but it would prove to be tremendous benefit to all the players of Chicken Invaders Universe.Whoever read the entirity of this idea I am true greatful for your time reading this idea.