At first I was confused that you could just go pass the bosses, but I guess that makes it realistic, you just climb past them and if one hits you you get thrown down the mountain. With a lot more bosses that could have worked.
Also, I think you might need to fix your camera script, it seems to not be moving smoothly.
Also, the screen is a little zoomed in, maybe more room for the player would be fun.
I don't quite understand the diamonds? If it were all in just one mountain and you had to climb up past them that would be fun.
I also think there should be more sound effects, but I get that there isn't always time for all that in a jam.