Can You Give Me Suggestions On What Needs To Be Added To My Game

I've been working on Gunventure for over a year now. I want to make the game better for new players. Can I have some suggestions on what would be good to add or change (other than the artstyle)?

GAME LINK: https://microstudio.io/codecat1/gunventure/

uhm maybe like color more than green and like fix bugs and stuff other idk tbh