polish entities that will appear in v1.0.0

[7yl4r]

There are a few "vyroid structures" (physical entities) and "vyroid species" (CA layers) that are in the game currently that need to be polished up. These are:

Structures:

1. :black_medium_square: chaser bumper-car-like thing (pondBomb / pond-bumper) #121
2. :black_medium_square: random fast red-CA spawner (tubSnake)
3. :black_medium_square: big-ol vyra-puffer thing (Vyrapuffer)
4. :black_medium_square: gosper glider-gun housing (large diamond-shaped thing) #123

CA species:

1. :black_medium_square: tiny red CGoL CA
2. :black_medium_square: big colorful CGoL+DGRN CA

Others:

1. :black_medium_square: player
2. :black_medium_square: + (health) powerup
3. :black_medium_square: square/star (bomb) powerup

We need to take a look at each of these individually and open new issues discussing how to polish each individual item. Some changes we might consider for each:

• unique sounds for each (continuous sounds and unique warp-in sounds),
• naming them,
• improving the visuals,
• tweaking the behavior,
• adding an entry to the game wiki,
• moving entity constructor out of core/entityfactory/EntityFactory and into their own class in core/entityfactory/Entities

If you have thoughts on how to improve one particular species/structure, please open a new issue with your idea. Once we have them in good shape I will :ballot_box_with_check: them off here. Once they are all checked I will close this issue.

[7yl4r]

Loose [entity polishing] item template:

# entity name #120 

General overview here.

## behavior / gameplay
1. list-items here

## art
1. list-items here

## sound
1. list-items here

## writing
1. list-items here