Oh no xd, you are 100% meant to avoid the floor. The intro cutscene was to show you the path to take. Ill change quit to back after this week is over.
You are meant to go from the box to the tv stand, then to the sofa, to the book pile, ontop of the arcade, down to the table, up to the fridge and along to knock the ball.
If you are struggling i 100% recommened easy mode, that way you can set checkpoints at any point. Similar to geometry dashes design.