Hi, I hope you're doing well! I wish you good luck and success with Soul of Hero! It is a nice & fun game and it is clear that a lot of effort and time has been put into it. I really like the character customization as well as the art style.
Being able to upgrade your character as you gain experience is a fun feature that can encourage players to keep playing which is nice! Also, it may be that I have a different version, but one suggestion is that on Windows, it would be helpful if the attack button worked if you clicked it once instead of holding it down to attack maybe. The different environments, enemies and items are interesting, and the art style is great!
Please don't be discouraged, it is challenging to get games noticed but hopefully your hard work will pay off!