3 new planet types added

3 new planet types have been added, bringing the total up to 40!
The new types are :

• Gas giants - this was one type found in our own solar system that was lacking in the pack. As I would like all planet types to be visually distinct and different from one another to be quickly identifiable by players in a game I went with purple hues for them.

• Tundra - sort of a bridge between colder and warmer planets, combination of snow and forest.

• Asteroids - not a planet type, but should be useful in most space games, also a step towards differentiating the pack a bit. Do tell me if there are other celestial bodies that you need!

⭐ Ratings & Downloads are much appreciated!