I enjoyed myself a lot! It's janky, but very competent, with a lot of good level design instincts and a charming adventurous spirit. It reminds me of old Flash platformers, in a good way!
I think it would have been wiser to not include the darkness and CRT filters. Also, the elevator sprite is both off-color and has a lot of noise in it, for some reason. If you plan to participate in color-limited game jams in the future, it would also be good to learn how to render single-color bitmap text, since the text contains many different colors (especially with anti-aliasing) that are off-palette.
This might be an inexplicable error on my end, but the audio seems to be mixed quite loudly; the audio regularly clips above -0 dB. Also, holding the continue button on the elevator screen causes the sound to stack on itself, becoming very loud.
I'm going to say something that will probably baffle you; it baffled me when I first figured it out. The "music streaming specific" events in GDevelop play the music using streaming behavior. As in, like a literal streaming service, which means I can pause the music with my headphone music controls, a behavior you probably don't intend to be possible. I'm not sure why it's set up like that, but it's why I just play music using the sound events and then make sure to unload music as needed.
All-in-all, great work! Congratulations on the submission!