Brainstorming

• Instructions
• Environments (i.e. jungle, ice cave, volcano, original, cityscape, tropical, mountain, beach, desert etc.)
  • Different graphics
  • Different mechanics
• Configurable player appearance
• Multiplayer
  • PvP
    • Players pick up and use gravity and scroll changers
      • Can pick up one or many? Many would allow cool strategies.
      • gravity gun that changes opponents gravity
  • Co-op
    • pressure plates
    • switches to shoot
    • gravity specific to each player
• Level editor
  • Level pack marketplace
• Continuous gravity field
  • Instead of having the same gravity on the whole level, each "cell" has its own gravity. Items rotate all cells' gravity.
  • Cell gravity indicated by background, something like this:
    
    
    
• Achievements
• Weapon/Suit/Equipment upgrades (a la Metroid)
  • Revisiting old levels for unlockables and easter eggs
  • Upgrades specific to the environment
• Storyline
• Enemies