If enabled by the map’s creator, players would get a character selection screen at the start of the game, where they would be able to choose different avatars to play with.
The creator of the game could give each of them custom stats and buffs, or debuffs. Including but not limited to: Speed, Strength, Size, or even unique skills (though more complicated to implement).
Example: A giant, who can deal and withstand more damage with a stomp move that deals AoE damage, but is significantly slower than other characters.
Heres my very silly drawing:
