Thank you for the kind words, i too thought the gameplay phase should be closer to about a minute, though we had some disagreements and ended up settling on 30 seconds instead, perhaps with a better visual indication of how many points you get per kill and a score counter it couldve been better to have the full 60 seconds of gameplay, so in the future if we do add those we will also test out a longer playtime.
As for improving the gameplay loop, unfortunately making it multiplayer pretty much ate into our entire scope, and we couldnt forego the multipalyer as this was our Unity Multiplayer homework from class, though maybe if we choose to continue with this game as our final project we could take care of the more important issues and maybe even add some content.