Add enemy constructor

and update and render
Instantiate enemies attempt #1, fix Game variables

making Game a constructor, instantiate with var game.
Game land appears, but not enemies yet.
Fix enemies. All enemies display successfully!

Speed randomly resets upon respawn at left of screen.
Work in progress, first attempt at player functions

Player does not appear.  Handle input needs reworking, is messy.
Display player and move on screen from input

No boundary or collision detection yet.
Place grass at end row in random column
Generate the level from game.rowMap

For easily customizable levels.
Player stays within map boundaries

No collision detection with water or bugs yet.