Great game! Creative interpretation of the theme. Also, I think you nailed it with the sound effects, what software did you use?
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Thank you for your kind words, I really am glad that someone likes this game ;3
As for the question you asked:
I used https://sfxr.me/ i clicked on whatever i needed for example Hit/hurt then tried it untill the sound was right. Or i just use "random". Also i have found victory sound here: https://www.freesoundslibrary.com/8bit-retro-success-victory/