Sarah is a girl with super powers, trapped in an evil villain's secret complex. In Sarah's run, any surface could potentially be the floor at some point, but there is only one way to escape, you'll have to warp your mind to as well as gravity to figure out how to get there!
this gameplay mechanic (which turned the game from pure-platformer to puzzler with platforming) happened almost by accident, I wanted to make sarah stand at an angle depending on the angle of the floor surface where she was. I got it working... *before* I coded the 'some stuff is too steep to stand on' bit, and as a result sarah could run up near-vertical walls. I figured what the heck, it was fun so I made it so she could run up any surface during her 'super' mode.