I totally understand your frustration, and you are 100% right! The lack of instructions is clearly the biggest issue right now, and I apologize that the game didn't explain itself at all.
This feedback confirms that adding a proper tutorial and clear visual cues is the absolute first thing I need to fix. And yes, that repetitive "babow" error sound is definitely on its way out!
To help you out right now, I've linked a quick video below showing the main mechanic in action.
Thank you for trying the game despite the confusion—your comment is incredibly valuable!