Stuff to think about now

• PvP/PvE battling (while ensuring a fair battle)
• Movement around the game world
• Domain specific language for NPCs/scripted battles

Stuff to think about in the future (gameplay)

• What type of world is the game set in? Fantasy? What is there in the way of magic/technology (if applicable)?
• Items/inventory/economy
• Shops/community spaces within locations
• Buffs/nerfs/classes/player stats as Discord roles
• Do we want a quest system? (Lord Kill-a-lot says "beat 5 players in a battle and I give you some snazzy thing")
• XP, Levelling and classes
• How to manipulate currently equipped items, etc. without exposing data to the opponent