A cool little platformer, where the controls generally feel pretty good. Also: very fair checkpoint placement, that allowed for a lot less frustration during play. Generally speaking, I agree with what Lucis commented, but I'd also like to add a few more things.
The parallax effect in the back- and foreground are a little too "aggressive" for me. Usually (at least I think that's the case) the further something is in the background, the slower it moves across the screen.
There's also no parallax when moving vertically (e.g. jumping or falling), which is just a minor critique I noticed.
I'm not sure if I experienced the end of the game, but after interacting with the water purifier (?) at the end of the third level, nothing but an overlay text happened. So it may be good to make the end of the game clearer (if that even was the end of it).
I also experienced a few little bugs:
Second level: the little buildings in the front of the background were jittering when moving to the side. Jittering gets worse in the third level.
Second level, during the passage where you have to walk over a temporary-plattform to get into a skyscraper: even with sliding, it was kinda difficult to get inside of it. It seemed that getting inside the building just randomly worked after a few attempts.
The intoxication indicator (?) on level 3 doesn't reset, even though it starts from the beginning once you go outside again.
It was still a fun little experience, and I can definitely see that a bit more polish could make it feel like a very solid platformer. Good job!