Interesting game. I included it in my Godot Community Jam compilation video series, if you’d like to take a look. :)

Just  when I thought I have a system for collecting bottles I failed ;d Greatwork tih your first Godot game!

Congrats on your first Godot project, it plays well and the gameplay is simple but efficient. An intro scene describing the story and the reason why you need to collect bottles could be nice - at first I wondered what this skateboard was supposed to do to the car and why I could gather up to 3 bottles :P

Pretty fun! I figured it out pretty quick. Maybe there should be a bonus for depositing the max amount of bottles at once? 

I have to concur that they look more like chicken drumsticks than water sacks, but I was willing to suspend my belief xD

Also, occasionally the collision will take several attempts on a water bottle (mostly from the top of them). I think it might be right after I deposit the bottles, maybe the variables makes it think I'm still full for awhile?

Ran the linux file, but I must say those do not look like water bottles. I was thinking it might be Nuka-Cola (from Fallout). Anyway, what exactly are we playing as, it looks like a skate-board.
The idea is simple and not too hard to understand. Good job.