Don't feel sorry, I was happy to play the game. It was your team's first shooter, and I'm sure lots of the feedback you have been getting will help you to iterate on similar ideas in the future. It was also a nice game to be made in 7 days for the jam!
I'm glad some of my feedback might have been helpful. It's always difficult to tune a game difficulty wise, as players are all completely different. Some might say the same game is stupidly easy while others say it's impossibly hard.
Good luck with future projects! :)