Congratulations on making your first game! I like how the audio builds the tension, and the timer is just barely enough time to collect everything.

If you collect all the coins and click Resume on the main menu, it takes you back to the game, but it's frozen where you left off.

Also, I didn't see the connection to the theme because I beat it with just a second to spare. I went back to see what happened if the timer expired. Then I tried to let the walls crush me, and it ejected me out of the map.