I like the concept - the world looks nice and there are some interesting elements going on in the game. I managed to beat the game. I think a top-down platformer is a good idea, but it would definitely benefit from a tutorial: your hint was good, but it relies on the experience of the player to know what that means and to have experienced a game with similar mechanics before. Up until the sky world, it purely feels like an exploration game at first, which kind of causes confusion when they have to focus on more precise mechanics without even knowing it (I think both parts are really good). Also, the end of the sky world was a tad confusing, I thought it was unfinished/didn't know where to go till I saw the "press 'E' here" show up. A little cloud door or maybe setting up the level in a way to show "this is where you go, this is the end" would be great there.
Seriously impressive for a first game in just 7 days, you have an amazing base and the game looks really promising and has a lot of personality. Congrats and well done!