Bow Levelling Concept!

Hello, everyone!

Yesterday I came up with the idea of making a weapon levelling system in minecraft, so I decided to make it! Or at least attempt to.
This is far from being finished, but all good things to those who wait! Whilst I have a mass abundance of time on my hands, I will do my best to update this as I go along. So if you like it, consider leaving me a diamond! and possibly some suggestions/constructive criticism/general ideas!
Or you can do that on my channel!

Progress:

Bow will level up to Level 2: Level 2 gives the user a speed boost and a trail.

Bugs:

Effects of bow will stay if you are not holding the bow/ do not have a bow in inventory.

You will level up if fire a bow once instead of 15 times.

To do:

Add more bow levels, fix annoying levelling bug and make an acceptable looking training ground.

Make this into a "One command block" Generator.

Add more than just bows.