A well-designed core loop should be engaging, satisfying, and drive the player to keep playing. Here are some steps to help you develop a compelling core loop for your game: identify the objective of the game (collecting items, completing levels, or defeating enemies), determine the player actions (jumping, shooting, or collecting items), define the reward system (points, coins, or new levels), add challenges (enemies, puzzles, or time limits), enhance (animations, sound effects, or special abilities).