When I meet with game studios, I often have the same question put to me over and over: if I’m writing/porting my game in HTML5, will it run well on the various targeted devices? Will it be playable or will the gameplay suffer too much? To answer that question, I often use my own experience based on what I know and what worked well during my own tests. But I also had the feeling it wasn’t enough to just provide some good advice. In the meantime, there were some obvious facts. For instance, we all know that mobile devices can’t animate as many sprites as a desktop PC and preserve 60 FPS (frames per second).