This is one of those cool games that appeared on Steam and then just went unnoticed for some reason. Basically, you play as a blob, and your goal is to make it to the black hole at the end of the level by grappling onto the terrain and flinging yourself over obstacles. It's really interesting and it's a shame that it wasn't really noticed by many.
Steam Link: http://store.steampowered.com/app/268320/
Website: http://grapple-game.com/
Some random gameplay footage I found on YouTube:
Steam Link: http://store.steampowered.com/app/268320/
Website: http://grapple-game.com/
Some random gameplay footage I found on YouTube: