I honestly had fun playing this game! It was simple, but felt really tense due to the timer. However, I feel like it would always get reset to 20 minutes left. The puzzles were pretty straight-forward, but they were ok.
The only thing I didn't like was the fact that you used A.I. for your cover, as I am against using A.I. for creative purposes.
Other than that, I think this is a neat little project!