This is impressive for your first game made in 7 days. The guy that makes you float upwards made me think of the Wario Land series, where getting hit by enemies can also be beneficial. Maybe getting hit by an anomaly that changes gravity on you could work similarly by letting you get to otherwise unreachable places. If you want to continue working on this game, that could be a direction for you to consider.
I also noticed that your parallax background is kind of inverted. The foreground should actually appear to be moving more relative to the camera, and the further away a plane is supposed to be, the more stationary it should appear to the PoV.
Keep it up!