I like the idea even if I think there are a couple of things to fix; for example the right mouse click doesn't seem to work for me, and maybe I didn't understand but I can't proceed beyond the first platform, the jump doesn't seem to be enough. 

Anyway good job for being your first game jam :)

(P.s. it's my first jam too so if you want, try my game too :3 )

I am not able to understand what to do. Can you please help?

I really like the idea, but I think there's a bug with input for fixing bugs (ironically), like i press the mouse left/right button and it doesn't fix any bugs, if i spam it sometimes registers though. Maybe you are checking for input in FixedUpdate? If that's the case then move checking for input into update (fixed update runs on fixed period of time, if your button press doesn't fit into that window then it won't register). Also I would recommend adding a physics material 2d with firction set to 0 on the player, that way we won't get stuck on the walls, would feel better.

Still for your very first jam game it's really cool, I also loved the intro lol.

This is my first Jam too (that I managed to complete in time)