In *Marvel Cosmic Invasion*, there isn’t a “Green Rubix cube mission select screen” as a distinct user interface element. However, your query likely refers to the **Green Cosmic Cubes** that are collectible items hidden within each of the game’s missions, and how they relate to the game’s progression and rewards.

Here’s a detailed breakdown:

**Green Cosmic Cubes (Collectibles, not the Mission Select Screen):**
* **Purpose:** These are special collectibles found throughout the game’s campaign. Collecting them allows you to unlock special rewards, such as Hero Palettes and Music Tracks, adding to the game’s replayability and customization options.
* **Quantity:** There are a total of 16 Green Cosmic Cubes, with one hidden in each of the campaign’s stages.
* **Achievement:** Successfully finding and collecting all 16 Green Cosmic Cubes will earn you the “Cosmic Cubist” achievement.
* **Finding Them:** While the first cube is automatically collected during the tutorial mission (“Nova Cruiser – Train for Battle”), the rest require careful exploration. Look for small sparkles in each area, as these often indicate a nearby cube. Many guides provide specific locations for each cube, often requiring you to interact with environmental elements like air conditioning units, alcoves, panels, or barrels.

**The Mission Select Screen:**
* *Marvel Cosmic Invasion* features a Campaign mode where you navigate a map to progress through its stages. This acts as your mission select screen.
* The game’s mission list includes 16 stages, such as “New York City – Road to Annihilation,” “Genosha – Heavy Metal,” “Wakanda – Battle for Birnin Zana,” and “Asgard – Fall of the Golden City.”
* While the collectible Green Cosmic Cubes are a significant part of the game’s progression and unlockables, the mission select screen itself is generally described as a “map selection” or a way to choose stages, not as a “Rubix cube.”

It’s possible that a visual element on the mission selection map might *resemble* a Rubik’s Cube, or perhaps the way you unlock and access content through the collected Cosmic Cubes gives that impression. If you’re encountering a specific visual that looks like a green Rubik’s Cube on your mission select screen, it might be a unique visual flair not commonly documented in general guides, or perhaps a temporary in-game event.

Keep smashing those cosmic invaders and collecting those Green Cosmic Cubes to unlock all the game’s secrets! If you’re looking for specific locations for those elusive cubes, or perhaps some optimal character pairings for certain missions, let me know!