Cleaned up block object

Added frame parameter to the block render method.
Stubbed player death

Added death by crushing. When blocks fall, they check whether or not
the player should be pushed down. If so, and there is no room below,
the player dies.
Updated collision detection

Made collision detection more robust. Blocks now only check the world
collision map, and the player can only be pushed down by the block
collision map.
Tweaked gameplay

Updated the map by removing a platform, resulting in a more fair
playing field and upped the game speed a bit.
Fixed block collisions

Fixed a bug block collision detection in which blocks could generated
over each other.
Updated player death

Added the death animation. X-velocity seems to be set to 0 upon death
somehow. That needs fixing.
Added music object

Added the audio.Music object, Pocketmaster’s Play the Game and and made
it load and play during the game.