Since it's called Battle Game, I suggest a Warpath-like approach to the gameplay. Please play Warpath to better understand the gameplay suggestion since I can only draw a general understanding.
  • Have a Crabada World map
  • The world map will have different territories where users will be able to travel to for different TUS fee based on the proximity.
  • There will be alliances created by the players, and each player should join to an alliance to fight the other alliances in order to invade their territory.
  • Each player will have their own bases where they could evolve and develop their crabs.
  • Players can attack other player bases.
  • Alliance members can help other members when they are being attacked.
  • Create alliance chat rooms where alliance members can interact with each other, and plan attacks or defenses.
There's actually so much more. But I believe making Crabada an interactive multiplayer game could create a huge attraction worldwide. In addition, this gameplay would create huge TUS sinking opportunities.