Stop An Actor Moving On collisions with another actor

SamOf2

so, my player controlled actor/character jumps over objects that go left across the screen, the floor also moves like this, thus, it is 'moveable'. However when it is in contact with the player controlled actor it is pushed slowly down and when the player controlled actor lands from a jump it is moved down a chunk, gravity/acceleration downwards only applies to the player controlled character, How do i fix it so the floor isn't moved away by the character. thanks