I want this game but am going to hold out until version 2.0 with more levels.
There won't be one, ever. They designed this as an episodic series, more levels are reserved for Episode 2, which will not include the levels from Episode 1. That's why the game is so cheap. You'll never see extra levels added to the current Episode, because that's not their business plan.
And BTW, just because one person beat it in two hours, why do you think you will? The game is based around puzzles, if you are an amazing puzzle solver with decent reaction times, the game will be quick, yes. But some of those puzzles are quite mind-bending at first.