It's unfortunate that this game is soul-crushingly unpopular, though I can understand that most people wouldn't ever consider paying 1.5 times more than the normal value of the game just get a beta version despite the fact that I consider it more than worth it
The newest version of the beta added, among many other bugfixes and minor things, the Engineer, who attacks with a grenade launcher and can set up turrets and mines (and is hilariously overpowered), as well as the first version of the high score board that shows all your stats, personal bests, and cumulative totals