I've been playing GD since 2.0, the game itself is simple and cool, if you want, calmly go through Hard and enjoy life! More complexity? Easy and Medium demons for you.
At the Hard Demon mark you can already pick up the cat so that if something happens, you can pet it and calm down. If you don't want to go through the levels, you can build them! You go to the tab with a hammer and wrench, and then to the same one. Then click on the New button in the lower right corner, and then on the same icon with a hammer and a key. In it you can build a level in any style (you can steal it from another level, you won’t be banned for this), and post it. But first you need to go through it. If you have good connections with TOP players, then you don't have to worry, but if not, then you will have to complete the level yourself (Directed by Robert Topala). You can also play levels from other players. To do this, in the same tab, click on the button with a magnifying glass. Set the necessary filters and click Search. You will be presented with millions of levels from thousands of players! You will learn everything else as you play. Bye!