Taken from the behind the scenes blog post: http://www.inear.se/2013/07/cube-slam-behind-the-three-scene...

Try for yourself with the ?dev querystring.

Some of the settings also bind to a key. In the game, try to select thedifferent cameras by pressing 1-5. Or press E and H to preview the explosion/heal effect. Or perhaps stresstest the physics by enable God Mode in the menu and press “Create Puck” or hit the P.

The mirror effect is also using a render target of it’s own. You can try the effect by pressing “M” in the game.

Full list of cheats can be seen here: https://www.cubeslam.com/cheats.html