A few suggestions
1. Try adding sound and music. When I discovered the game was silent it sort of took away from the experience. Nothing too drastic. Just a few sound effects would help enhance the gameplay.
2. Game shop with an ability to pay to remove ads. It would be good to allow ad removal via payment. It could be one time purchase or subscription. (RM ads are a bit annoying among others).
3. More challenges. Make the mafia bosses, animals, etc a little more challenging to get by.
4. Maybe add a story mode where our character has to get keys to open doors and find more creative ways to cut the rope.
I can't think of any other suggestions at the moment. I'll check back in a few months to see if anything improves gameplay wise. Thank you for all of your hard work and dedication to your project. Good luck on future endeavors.