Click anywhere on the screen to place the peak of the projectile's path (the highest y value). Do not place the peak below the y value of the start position (black rectangle) Press space with the cursor anywhere on the screen to move the start position. Look inside and change the backdrop to place objects, with which the projectile will interact with. Press the flag button again to watch the simulation. Press g to edit the gravity (make sure it's negative, otherwise the gravity will be up instead of down) The red line shows the trajectory of the projectile, and the orange line visualizes the initial vector required to reach the peak selected.
This project is made completely using my physics knowledge and uses equations to calculate the trajectory of the projectile. As a result, the projectile will not be 100% accurate to the peak due to scratch rounding when it comes to movement.