21/5/2020
I make some changes on the throwing function, so that it likes shooting instead of throwing. When apply into our shooting task, the bullet was not going to explode when it collides with the object.
To fix this problem, I add the collusion detection of the bullet. When the bullet collide with object, it will disappear.
And I add the explosion effect when the bullet is collide with other objects.
Afterworld 