Really impressive work for a team of 2 in week's time. There was some elements that I found were un-intuitive / clunky (moving the cannon on the track) It took me a couple tries to understand how to move it properly and it didn't feel great . Honestly I think this was really ambitious for a short game jam project. The visuals were really fantastic, sfx / music really fantastic. Your itch.io page is also really nicely designed.
I experience a bug where I couldn't "exit" the game / restart after loosing also, I think it's already mentioned but just in case.
Overall, I think if y'all plugged away at this post jam you could give it the polish it truly deserves! Great job regardless of the issues and good job in such a short amount of time.