KnightBroseph was playing and streaming Energy Hook - a new indie game developed by Jamie Fristrom, creator of the swinging gameplay mechanics in Spider-Man 2. You can buy Energy Hook on Steam for $17.99 (without discount).
Fristrom has been working on Energy Hook for over three years. The game is a spiritual successor that intends to keep the best parts of Spider-Man 2 by stripping out the pesky combat, replacing it with a SSX-style trick system, and adding a jetpack. Read more details about the game in its profile.
Enjoy almost one hour of a quick swinging action, run on walls, loops, spins and another aerial tricks made by KnightBroseph :-)