I gave the game a two because I feel it could be improved a lot. It's just not as fluid as i'd have expected, it takes WAY too long to die, the weapon's dynamics need to be improved, graphics are okay for a Unity game, and there is no BGM. (feel free to browse my audio if you need music.)
Overall, I feel this game actually has a lot of potential. What you have here is a decent "rough-draft" version.
Keep at it, there is definitely hope for this game yet, and I have faith in you!