I have been working on an assets list for all the environmental things in the game. That list contains:

HIGH PRIORITY
Players Spaceship
Enemy Spaceship
Gingerbread houses
Gingerbread Workshop

MEDIUM PRIORITY
Gates
walls
Bordering trees

LOW PRIORITY
Floral

I have come up with an map design for the level.

I have set it up so that each area is like an arena that the player must complete certain objectives to move on to the next. Once complete the player can move to the next area through the long path which is to represent a path to glory.

In the first area the player needs to survive the onslaught of enemies before the next area opens up.
Area 2 they will need to collect items to assemble the weapon while enemies are attacking.
The next area is another survival while the weapon is being put together.
Then they go and kill 150 enemies with the new weapon.
finally the need to disable the enemy ships by destroying their weak spots.

The player is a human from earth visiting other worlds. When he lands the candy people give him a candy gun in exchange for your service.

The candy people are the natural inhabitants of the land, they are cheerful, and friendly.

The fruit people are the enemies, they are strong and mean, trying to eliminate everything.

The world is made of candy, everything is bright and colorful.

Below are pictures I've gotten off the web for ideas as to what I can base the environment of the game on.

Here are a few ideas as to what the characters could be.

While I was taking a break from my studies an idea of a candy land type game came to mind. An astronaut from earth lands on a planet which is made from and populated by candy but is currently at war with fruit. Because your sweet tooth temptation is overwhelming you immediately take the candy’s side. You find a candy gun that shoots deadly candy bullets from what’s left of the candy landers and start blasting as many enemy fruit aliens as possible. I chose to have fruit as the enemy because fruit is the healthy alternative to candy.