Future Ideas Brainstorm

* Multiplayer co-op
* Hex Grid version - https://github.com/flauwekeul/honeycomb
* (90 degree) Rotating playfield 
  * Special control block causes rotation
* Pixi Filters - https://github.com/pixijs/pixi-filters
  * Shockwave filter for combos
  * Lighting/shadows https://www.npmjs.com/package/pixi-shadows