Need more visible texts when in workkshop, need some popup information on upgrades (put cursor on "attack" and it actually tells you what it does in-game)
Same for "weapon levels".. what is it supposed to do? Im lvl 40+ in gatling.. and really im not sure it does anything special.. extra damage maybe?
The "Chain Break" pause-like event is extremely anoying, break the flow of the game.. just make it all more confusing when it happens several times in a row.. the basic cube death bullets are very guilty of this.
Maps are repetitive.
But, the game is fun to play, it controls well with the lock-on system (but personally i would have prefered movements linked to WASD keys, and aiming with mouse), weapon damage is shown on-screen so we know we are getting more powerfull.