4. Customisable Bob: Players can customise aspects of their character Bob, including costumes, masks, and accessories. This allows you to blend in more effectively in certain environments while also giving the game a slight layer of RPG mechanism.

5. Different Environments: From castles and museums to military bases and even futuristic space-stations, Robbery Bob 2: Double Trouble offers a diverse range of environments to explore and steal from.

Walkthrough:

Level 1 - The Prologue
The first level is a tutorial to help players get familiar with the game's controls and mechanics. There are no enemies here, and the level is very easy to complete. Players are tasked with stealing a gold bar and making it to the exit point without getting caught.

Level 2
Level 2 introduces the player to guards and security cameras. Players must navigate through a series of rooms filled with guards and cameras, working out the best way to avoid detection and steal all of the loot before making their escape.

Level 3
In this level, players must use stealth to move through a military base filled with guards and attack dogs. Players must keep out of the dogs’ line of sight by hiding behind crates and walls, taking out a few guards along the way, using special tools such as the trap and sneaky uniforms.

Level 4
This level is set in a mansion, with the challenge of collecting all of the rare paintings without being detected. Players must also watch out for the game’s laser sensors, which can give away their position if they're not careful.

Level 5
In this level, players must steal a valuable item (an antique vase/resin) from a museum. The museum has advanced security systems including locked doors, traps, and motion detectors. Players must be careful to avoid these systems while figuring out how to collect the loot and make their escape.

Level 6
This level is set in a secret research facility, and players must steal sensitive documents that are kept in locked safes. Players must look for clues such as combinations and passwords to gain access to the safes and steal the secret documents.

Level 7
Players must use their sneaking skills for this level as they travel through a luxury private yatch that is hosting an exclusive party. The challenge is to steal a stash of jewelry without being caught by party-goers or security personnel.

Level 8
In the final level, players have to orchestrate a heist on a futuristic space-station. The station has drones patrolling making it harder to avoid detection, which requires players to use their gadgets and tools such as teleports, flashbangs, EMPs to takedown enemies.

Conclusion:

Robbery Bob 2: Double Trouble is an engaging and immersive game that provides hours of challenging gameplay. The diverse range of levels keeps things fresh and interesting while also providing a steady increase in difficulty as you progress through the game. Although it can be challenging, the game incites your brain to be creative and stealthy throughout your gameplay. Its cartoon presentation is quirky and enjoyable to play. Players seeking a stealth puzzle game that is both entertaining and challenging need look no further than Robbery Bob 2: Double Trouble.