Looking forward to see what you can come up with! Remember, this is html5 so there are tons of online js libraries you can port to superpowers to fit your needs. Also, I recommend learning threejs in and out of you want to access more advanced 3D functions. Here is the plugin: https://github.com/florentpoujol/superpowers-game-... and documentation can be found at https://threejs.org/docs/
Have fun! :D hopefully you find this to be the engine you stay with :). (I'm 16 too, so high-five!).