Please excuse my poor English; as English is not my mother tongue, I had to use a translator in places to express myself in English.
This game has a cool concept, but the implementation is not as good as it could have been. First of all, the player's character has an outline, but everything else does not. This just doesn't add up and is unfortunately a slight downgrade to otherwise very good visuals.
Next, I think (this is just a personal opinion) that the game is overly difficult right at the start. I know that I'm not very good at platform games, but I still think it would be better if the game became more difficult over time, rather than suddenly becoming so difficult that it's no longer manageable, at least for me.
Otherwise, the game is really great. I really didn't expect a voice-over for a game that has to be created within 3 hours. The fact that the game has a background story, why the player acts the way he does, is also a plus. The music also fits the game perfectly and encourages the player to hurry a little more, as it conveys the feeling that there is only a little time left.
Overall, I think this game is really worth playing, as the weaknesses mentioned above are not too serious, which is why the game gets 4/5 points from me.