First, I had a player sprite that moved, but wouldn’t obey the laws of gravity. So I unchecked the “Is Kinematic” box, and now it won’t move at all. I’m using the PlatformerCharacter2d standard asset. How do I fix this?
It is because gravity is affecting your player. You can turn off the gravity by setting Rigidbody2D.gravityScale to 0. An other option is adding colliders both to the “floor” (if there is one) of your scene and to your player, preventing it from falling through.