Thanks! At first we wanted to make it more clear (like color-code items that gives you certain effect), but during playtesting we discovered, that in a fast paced game this takes away from the fun (because instead of hitting the boss with whatever you have, you are hunting for a specific item), so we introduced even more randomness! Since there is a correlation between ammo count and certain effects you never get stuck with very weak, or very strong gun for too long.
Glad you liked it!