Very charming game. The Intro cinematic, music, levels. All clearly made with love for the craft. Do wish I could jump when grabbing with both hands as I tried to do this a lot instinctively.
Thanks for playing! If you mean the space bar jump move, you should be able to do that when grabbing with both hands, just tried it myself with WASD and arrow keys and it seemed to work just fine. If that's the issue, maybe try the Windows download instead?