I like the co-op idea. :)
Also had some ideas: You could maybe add a little co-op puzzle or some obstacles that the other player can activate. i personally would go for a puzzle for a more cooperative experience. seems to fit the story too.
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Thanks for taking the time to check out my game. I'll take your ideas into consideration. In fact, I had them in mind because I think they would make the game more fun, but due to the limited time I had, I couldn't implement them. Actually, I was even thinking of making it for up to 4 players, with a screen split into 4... Do you think it would work? What do you think?