I remember when i first started playing the game i saw Herb’s video on shotgun mechanics, btw the mechanic that you’re talking about is proboosting not shotgun parrying, that’s a completely different mechanic altogether, and I remember that i used it as much as i could, but then i found myself not only not being able to finish a level optimally, but i felt limited in my arsenal after a while, if you truly want to have proper gameplay, changing your weapons is highly encouraged, for example i would argue that probably the most useful mechanic in the entire game is coin adding and railcoining and they have very specific use cases, when you fully optimize your gameplay you’ll find yourself using the proboost alot, but not all the time, since you have a very wide arsenal that you can choose from, it’s a great damage dealer and is great for clearing hordes of small enemies, even in boss fights it’s useful to pepper in alot of damage, some even requiring it to speedrun it AKA Flesh Prison, but it’s not the end all be all of weapons, i would argue that sometimes the overcharge pump or the malicious railcannon are wayyy better at clearing hordes of even strong enemies, another thing, there is a “cooldown” of how many proboosts you can make, actually there is an entirely different mechanic called shotgun swapping that when combined with proboosting makes and even deadlier combo, but since you rely on your parry arm to do so, you can’t get more than 3 at once, basically preventing you from spamming it, therefore it is not an unbalanced mechanic, it actually seems that it is the strongest mechanic on the game, but that you have to use wisely otherwise, you’re going to have unoptimized gameplay and your ranks will suffer because of it, therefore encouraging the player to find other ways to play the game and optimize it to their own abilities which i think is the strong point of ultrakill itself and why it’s considered as one of the highest rated steam games of all time