i like the idea and i think it's very interesting. also, it uses the theme fantastically, as it's based around recycling, that's the core gameplay loop actually.
what you could add to improve it is, as others have noted, a tutorial, sound effects and some more indicators for the player, in general (like telling you when you've gone bankrupt and have to restart the game, or telling you how much scrap things cost, or maybe how much you're gonna earn from delivering each order, among other things).
i get that it's difficult to do all these things in such a short amount of time, but i'm confident implementing those would make this 10x better at the very least!
keep it up!