Love the idea with the balloon, and it was very fun! It was a bit hard to get the balloon to the size you wanted though, and it was a bit annoying to have to hold shift for most of the game, maybe you should just press shift to switch between deflated and inflated balloon isntead? But I still really enjoyed that idea and it was fun to use :3
I also like how fair the spike hitboxes were, and the ending was really sweet :)

This was really fun! I love the soothing music and I find your idea for the balloon implementation creative. One problem I had was understanding the collisions with the the character and the spikes, it was hard to know if I was going to respawn or not before effectively respawning, even after jumping and seeing the trajectory.

But yeah, overall really cool concept. Keep it up!

Cool platformer! I really like you balloon mechanic and how you placed your obstacles with that in mind! The music was nice and relaxing  Well done!

It's a very fun platformer, I've also made one if you want to check it out. I like the mechanic of inflating the balloon, I appreciate that it's not just a gimmick and there are sections where you have to navigate with the balloon deflated or fully inflated. It's very original, good job^^

Awesome game, greate Special object implementation =D 

 some tipps for the future :

1. for me the die sound was really loud

2. the character jitters when moving : 

howto fix camera jittering  - https://docs.godotengine.org/en/stable/tutorials/rendering/jitter_stutter.html

Thanks for this game !