After a lot of time spent creating abilities and animations, I've finished a space multiplayer game with pixi.js (available at https://starmos.io/). My original idea was to make a vector based space game using SVG, but that quickly bogged the rendering. Switching to pixi was a lifesaver, and I was able to keep adding more animations without drops in framerate.
The idea of the game is to fight with other players (or bots) to gain levels and increase your score, which unlocks increasingly powerful combat abilities (abilities can also be caught temporarily by a passing comet). There are six