Better version: https://scratch.mit.edu/projects/1153241662/ For @ShootingMeteor8471 Press space to spawn a "shell" Press D to show or hide debug variables "Goomba" follows the mouse pointer - try making it collide with the "shell" Eay way to code a projectile system for something like koopa shells - it uses variables to store the x/y positions, and the other objects compare their own coordinates with the shells'. If they're close enough, then they've collided. This system actually allows you to keep the projectiles in the same sprite as the other entities Super Mario For Scratch 4 was the first game I know that used this system; this is a modified version of that.