I think the ceiling is an important addition to stop the player just flying over obstacles.
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Haha, I’ve just added the background and found out I need a torch 
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The ceiling sounds like a really good idea for limiting if it’s possible to levitate infinitely xD. another method i head about is something called ray casting to detect ground beneath you if you want to prevent him from jumping infinitely.
I Just finished Terminal Hacker but after seeing this, i’m excited to see project boost is about haha