From Emanuele Feronato: "So we have our Space is Key game buikt with Phaser 2.6.2 though three steps: first we created the floors and make the player run and jump, then we added deadly obstacles to be avoided as well as some level design concepts and in 3rd step we made the player die with a particle explosion when the square hits an obstacle.
Now we are adding colors to the game as well as backgrounds. And guess what, we’ll make it while continuing to use just the same graphic resource. I also added a couple of new floors:"