"This game is good. Love the pixel art, good UI, animated boss, and cool doors for upgrades. Here are some easy-to-implement tips to make this game even better:
- Explosions and Particle Effects: Adding explosions and particle effects would be amazing. They will contribute significantly to the overall "Game Feel."
- Hit Delay (Freeze Frame): Consider adding a super short freeze frame when a hit occurs. This small delay can enhance the impact and make the gameplay more dynamic.
- Money Disappearance/Sinking Mechanic: Make the money disappear or sink slowly. This can introduce a gameplay mechanic where players have to go deeper to collect their rewards.
Please don't feel offended by these tips; you've already created an awesome game. I just wanted to provide some points for improvement.