How do I get the AI to work better?

Keep it simple - start with a simple idea, add one feature or adjustment at a time. Avoid the temptation to create an overly complex prompt or to ask the AI to create a complex game (‘Create GTA!'). If the AI stops working well, revert to the last version that was good and continue from there rather than arguing with it. Each chat is one game. Do not try to create a completely different game in the same chat.