First of all, you finished a game that looks great overall — and achieving that in just 7 days is impressive. Great job!
Things I liked:
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I really like your approach to the theme and the way the story is presented. The voice actors did a great job, and all the elements feel cohesive and aligned toward the same creative direction.
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The mechanic of opening doors using different combinations feels unique and fresh, and it is well implemented.
Constructive Feedback:
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It took me some time to understand how to open the doors. Once I figured it out, it felt intuitive, but I would recommend refining the early level design to better teach the mechanic through gameplay, especially in the first few doors.
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I would also suggest differentiating the door symbols not only by shape but by color. Additionally, you could display the control/color combinations in the UI during the first levels. This would help players understand the mechanic more quickly and reduce the time spent trying to remember which symbol corresponds to each mouse button.