On the lower right side of the screen, click on the card you want to play (One card will be played, One card will be burned and two new cards will become elegible)
On the top left corner of the screen, there are the speed controls
Escape shows a Menu that allows you to go back to the main menu or restart the level
Date: 12 September 2016
Moving forward, it would be interesting to craft a set of hand-made levels to give the player an objective, increase the number of different cards and effects and create a Deck Manager so the player can build their own decks.