So I played through the whole game. I only found 14/20 of the magazine collectable's. And I searched pretty hard. I would try making them a bit less difficult to find.
All in all its a good game, the platforming and movement feel really good. I see you said in comments you plan for update/patch soon. Do you plan to add any more content to the game or just fixes? Not that is not enough content for the $6. I just enjoyed it and would love to see maybe new stages or even an online leaderboard .
Also really enjoyed this stage, my favorite level in the game by far.