PS : I'm also shocked to know the Anamanaguchi feeling was intentional and actually hidden in the song name !
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I'm really grateful for your thoughts and since I've only been doing this for one month I think I will keep learning new methods on doing music and sounds!En dag på stan is also not my favourite track, it feels like more of an interlude and I put it there just like a breaking point between the two last songs!
PS. Retuscherad is Swedish and translates to Airbrushed, which is an Anamanaguchi song! 
I can't give you any technical tricks because I have yet to make chiptune myself (yeah, I know). However, from a listening point, I think the songs are too similar in sound. You should try experimenting more with the square channels instruments.
I also think the weakest song is En dag på stan. I really didn't care much about it. Galenskapen's not my favorite, but I think it has something poweful that ends the EP pretty well.
Retuscherad has a cool Anamanaguchi feeling to it. It's kind of like a cool summer walk in the city.
My favorite has to be the opening track, Lyckan. The melody really gets stuck in my head. It's catchy and simple. I really get why you put Kola och Twix but I'll go back to my first point : they sound way too similar to one another. Aside from the vibrato, I could easily mistake parts of it in being the same song.
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