Great game! The countdown sound and pixel art style reminded me of V1, lol. The navigation aspect fits pretty well with the theme, but I feel like the timer is too short also (and this might be my problem as i'm not using mouse but trackpad) but I felt like the camera movement was really slow, especially since the theme is countdown.
Ultimately, really well done especially since you chose to make a 3D game!
Just some small tweaks to make (like everyone in any game jam).