Sure, below is a basic implementation of a game with jelly physics featuring a red blob as the main character. The game is designed for smartphone operation, and the background is dark blue. The game has simple mechanics where you can control the blob's movement by tilting your phone left or right. The objective is to collect as many stars as possible while avoiding obstacles.
Please note that this is a basic implementation, and you can customize it further according to your preferences, like adding scores, levels, or additional game elements as per your requirements.