Would be nice some interaction with the robots, at least the should shoot you back to make it more fun.
You have some serious issue with the UI buttons. When the "Next" button shows on screen, you should block the "shooting script", I found when i had just one bullet left, and click on the "Next" button, it's replaced with the "Restart" button.
Also couldn't manage to fight the last big robot you mention, cause the last "Next" button doesn't seem to work propertly, like there were no collider to interact with. I hear the shooting on the background, but the scene is static on the UI
Anyway, Congratulations for completing the Jam!
