Project: canvas
Task (moderate): Add item 'Heart': shaped like a red heart ❤, represents an increase of one life. Events that previously caused game over will now reduce one life instead, and the game will only end when lives reach 0, with a maximum of 10 lives ('store.maxLives'), default is 1. Render ❤ x [lives] in the upper right corner of the canvas, stored in 'store.lives'. When we loose a life get a protective shield for 1 seconds.