I like the general idea, you can never really go wrong with grappling hooks. What I was really unsure about it the goal of the game. I thought I must get to the end of the panels and the bar on the bottom of the screen is my HP somehow, but then I got loaded into another level. In Teletubby land, I couldn't even find where I should go.
I think with some improvements (pause menu, UI, conveying information to the player) this could make a very interesting game. Do you plan on working on it after the jam?