1. frame buffer coloring object - additive layer that fades out. colors are added by players and special fx(blood,etc.)

2. throwing entities (can throw players!)

3. multiplayer, _NETWORKED_ and local

4. game is in: stages->waves
  each stage is a separate color, is shown as a separate FBO in the background. when current stage end, it zooms up to replace the current stage
  waves then occur

5. explosion/gore

6. multiple enemy types
  also boss - each boss is a shadow of the player, probably

7. some sort of block/counter attack

8. items (parasole, etc.)

9. music and more sfx