Nice mechanics, good level design. I also like using of orange for background color - I easily could see somebody else making similar game using just black, white and grays. I hope you're thinking about making some continuation - I'm really hungry for that kind of puzzles :)
 "Down is Up"){kind=icon}
 "ButtonHunt 2"){kind=icon}
 "This is the Only Level"){kind=icon}
 "Platform Journey"){kind=icon}