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Nice one! But it's not a bug. It's a feature!
All the enemies take a random direction at the start of every level
If all enemies always start at a particular direction the level will be ALWAYS exactly the same (if you die, you will have to repeat the exact same level)
I'm pretty sure that setting enemies with random directions it's a good decision
Obviously NOT all enemies have this behavior
BTW, the game is already published on Google Play! Have you rated it (5 stars, cof, cof) ?