I was able to find the pause menu (sorry about that). While using it, I noticed a few issues. The only button I could get to work was the Resume button. Also, whenever I pressed Space to launch the car after opening the pause menu, it would briefly appear and then disappear again.
I'm not sure if these bugs are because I'm using a Chromebook or if they're caused by something else. Since we're still within the 24-hour bug-fix period, I just wanted to let you know in case you'd like to fix them.
Again, I'm sorry for missing the pause menu the first time, and you did a great job on your game!