Wow thanks for the detailed feeback! Yea the tutorial definitely needs to be replaced for a fuller experience, was a last minute addition for the sake of having "something". I think the freezing may just be your computer as I haven't seen anyone else comment on it, but, something to keep an eye on in the future. More visual and auditory feedback for the game in general would definitely be a focus if I continued development especially as you noted for when there are large crowds of tanks. Changing up how the enemies attack and their projectiles is also probably something to look at, currently they are simply the same as the players.
And finally I'll readily admit it's a looser interpretation of the theme than other more direct entries, you "join together" with defeated enemy tanks to grow stronger, you add them to yourself, borrowing their armor and weapons and as you get damage they break and you lose those additions.
I appreciate you taking the time to play the game and write up all that feedback. Thanks!