Just keep making games! My games sucked big time when I was starting out, but with each game you learn something new! It's like unlocking new stuff to play around with, by making each new game something out of your comfort zone (This was the first time using Unity's animation tool and like my second time making a 2D platformer!). Finding a group of friends to bounce ideas and laugh together also helps. For reference, I've been making games for around 3 years (Only started uploading games on itch.io when I thought my games were starting to get good which makes it seem like I always put out decent games, which isn't true!). I've played your two games on itch.io (which are pretty good!) and with a bit of polish, you can make some excellent projects!
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You're English is really good, don't worry :). My friends don't know how to program, but they are artists/musicians/etc and have played video games before, so they help despite me doing most of the work. Maybe get your friends in non-coding roles (since programming is scary to most people) in order to help during game jams.