Graphics, Resolution, Collision, Variables

- Game canvas resolution changed.
- Variable values modified to allow easier change and adjustments.
- Graphics changed (needed a higher resolution image).
- Modified isCollide() function to allow use with other sprites
- isCollide() works with goomba and fireball

Problems and important needed additions:
- Goomba falls off screen, need to add a new goomba after death.
- Need a way to add more enemies randomly and be able to detect which
one is colliding.
- Tried array but broke the game