This took me some time to think in which theme I would inspire to do this game and then I saw my hamster running around the cage collecting the food, so I thought it would be a good idea to do a game with that theme
Title: Blocky Hamster Snack
Experience: Spending Time/Relaxing
Theme : Hamster
Core Mechanic: Breaking Block and Collecting Food (Collecting Points)
Core game loop: The player should break as many blocks as possible to get food for the hamster before the hamster head touches the bottom of the screen. The more points/food you have, the better will be the score at the end. But there will be a minimum of points to pass the level.