Powerpuff Runner

Develop a mobile-first browser-based endless runner game centered on the three core characters Blossom, Bubbles, and Buttercup. First, build a simple and clear character selection screen at the entry point, allowing players to pick their preferred character directly before entering the side-scrolling running level. Implement core control logic: tap the screen to make characters jump over ground obstacles including cacti, rocks and trash cans, hold the screen to trigger a flying state that lets characters ascend to a higher position to dodge aerial threats such as birds and drones, and support variable jump height corresponding to the duration of the hold action. Design a dynamic difficulty mechanism that automatically increases the game running speed as the player's score rises, to test and reward players' operation skills and reaction reflexes. Integrate core interactive feedback features: add screen shake and particle burst effects when characters collide with obstacles, set a retro pixel-style display for the real-time score, and use localStorage to store and track the player's highest score data. Configure independent distinct color palettes and exclusive running animations for each of the three characters to highlight their individual characteristics. Finally, add an instant restart function that displays a TRY AGAIN prompt immediately after any collision, allowing players to re-enter the game without extra waiting to enhance the smooth experience.