Shoot Between the Thinnest Guardians
OK so, when you're battling the bosses, you will see a bunch of items related to the type of boss you're dealing with, going in a circle around them. Your goal is to reach the boss with each of the shots from your sword (hence the name "Swordshot"). So as the items are spinning around, you need to shoot in between to get a hit on the boss.
Like with most games, each boss has several hit points before they can be destroyed. As for you, you have a limited amount of shots you can use, so be careful. But, for the items, it's best for you to shoot in between the thinnest objects. This will give you a much larger gap to shoot your shot.
It's really all about finding those gaps. Fortunately, the bosses don't fire any projectiles at you or anything (that would suck if that was the case since you can't move) so all you need to do is aim and fire. Find the best gap and stick with it as the items spin in circles.
Take Your Time
In Swordshot, it can be easy to just continue firing away constantly. But feel free to show some patience until you know you have the perfect opening to shoot. There's no real time limit in the game, so you can take your time for the most part.
Remember to follow the smallest objects in the rotation and fire in between them. All of the bosses have several hit points and you want to make sure you hit as much as possible. As mentioned, you lose a shot each time you fire, so shoot wisely.
The key thing is to be ahead in the count if that makes sense. It's a lot easier when you have more shots than they do lives. It takes the pressure off of you and it's good to sort of ease that tension by getting ahead. You should be in great shape if you can connect on your first three hits or so.
Take Advantage of Skills
Swordshot does offer the ability to let you use skills that can help you in each battle. You normally get to choose from three different skills, each offering their own benefits. From giving you an extra life to dealing extra damage, you'll have enough to get you through.
To unlock skills, simply take down some bosses to earn Shards. These can be used to unlock certain skills that you can utilize against each enemy. Just double-tap the skill in the Skills menu and voila, you now have a nice benefit that can aid you in battle.
It's easy to try and speed through each enemy, but just know you have these skills at your disposal if you feel like you're struggling a bit. Remember, the game can be challenging, especially once you reach the "super bosses". So take advantage of your non-cheating cheat codes.