Design ideas

Ok, so I have a sandbox testing playground of a game. But what to do with it next? Here are some of my ideas.

Settings:

• post-apocalyptic settings
• broken technology everywhere
• placement in space (old space station? stars visible through windows?)
• still partially functional
• main goal is to repair station (collecting necessary spare parts while moving through levels)
• levels are not fully accessible at start, you need to push correct buttons, levers to open some previously inaccessible corridors
• main character is a small robot (or robots?)
• body is basically a rotating sphere with some levitating head/arms
• cute stylisation as in contrast to bleak world

Gameplay:

• navigate through maze of corridors, get to the exit, fix given engine part, etc.
• use abilities, solve puzzles to unlock inaccessible level parts
• interactive environment: buttons, levers, inverse gravity fields, doors, elevators
• with level progress growing set of abilities (pushing buttons, controlling gravity, controlling elevators, moving objects, etc.)
• isometric top down camera?
• co-op gameplay:
• two robots with differing set of abilities
• one can push buttons (opens door for other robot)
• other robot can jump, move object (cover the hole in ground for other robot to cross)
• ...
• need to cooperate to unlock the path for other robot
• good for singleplayer (switching between robots) as well as for multiplayer (each player one robot)