Players should have a “mass” tag, that allows the game to read how many items a player has in a roundabout fashion.

The tag is naturally scored 0-100, but can artificially be increased with commands

37 points comes from having the inventory and offhand filled with any item, stackable or not.

The remaining 63 points come from the mass of the armour, divided amongst each piece, and the material contributing to the mass.

Helmet: 8-14 Chest plate: 14-20 Leggings: 12-18 Boots: 4-10

Leather has a low score, then Gold, Chainmail, Iron, Diamond, and Netherite, these scores are stored separately so armour mass can be read on its own before being combined for total mass

This doesn’t impact the player in anyway in terms of speed or jump, but allows the game to detect players with certain items or armour

Also a mass tag can be applied to any item, this could mean a check could be ran to see if the player was only carrying a certain mass of items, or no items at all, 1 point would be deducted from the total value as it also takes up an inventory slot giving the player a score of 1 naturally.

This should also affect the velocity of the levitation effect. Levitation I has more of an effect on a player with an empty inventory than one with a full one.

Also, when the player has a score of 0, they should be able to stand on dripleaves.