Level 15 now and no i don't use any Hacks

but yea i'm totally cracked out on this game... here's the secret to my success thanks to all the really good gunz players who have royally owned me and been gracious enough to share their techniques.
Aiming & Leading Shots
Leading shots is when you predict where a player is going to be due to lag. If the players ping is ~100, you should aim a second ahead. If the players ping is ~50, aim 1/2 seconds ahead... you get the idea. An easy way to get around having to lead shots is to line your shot up in a way that the enemy is moving perpendicular to your character.
Armor & Hitboxes- Hits to the very upper chest + head deliver 75% of the damage to HP and 25% of the damage to AP(armor points).
- Hits to the lower chest and below deliver 50% of the damage to HP and 50% of the damage to AP.
- If the damage equates out to an odd number, health takes the lower amount and the extra point is taken away from armor.
- It doesnt matter which armor pieces you're wearing, only the total number of points. Not wearing armor over a peice of the body does not effect that part of the body more or less than any other.
- If you run out of AP, 100% of the weapon's damage is taken away from your HP.
1337 moves
was told this was the Korean-style of playing... good weapon combos are revolver and shotgun and a sword... daggers wont work with this style so you have to have either a single or dual sword equipped. I've been using the Ellanx2 SMG (probably better idea to use dual pistols or revolvers though), Breaker 5 shotgun and Iron Kodachi Dual swords on my toon.
Basic Korean style moves
Wall-Canceling
To do a Wall-Cancel, Stand perpindicular to a wall. Have melee active. Run at the wall, jump, jump off the wall, slash, dash at the wall, jump off the wall, slash, dash at the wall, jump off the wall, repeat. This is a basic move to keeping yourself in the air.
Multiple-Wall Run
This is a harder move, due to the small angle-of-approach used for a wall-run. You can't approach from a large span. So when doing this move, keep this angle in mind.
To do a Multiple Wall-Run, start a Wall run on a wall. When you near the end of the wall/run, jump off, slash, turn 180 degrees, dash at wall, and double-tap space bar. This is a tough move to get down. You can turn this into a continuous wall-run by not doing a 180 degree turn. I've taken replays of both to give you a better understanding of what to do.
Light Step
This will train your fingers for the half-step and flash-step. It's a pretty useless move, all it does it let you dash twice in midair.
To Light-Step, jump, dash, slash, and dash.
Butterfly-Step
A fundamental of swordfighting.
To Butterfly-Step, Jump, Dash, Slash, and Block right after the slash.
The Slash-Shot
To Slash-Shot, Jump, Dash, Slash(HOLD), Change to a Gun, Gun will shoot.
Advanced Korean Style
These are what make the K-Style so good
Half-Step
Once you get this move down, chances are you wont use the Slash-Shot anymore.
To Half-Step: Jump, Dash, Slash(HOLD), Change, Dash(RIGHT AFTER CHANGE), Gun will shoot.
Eighth-Step
Another Variation of Half-Step, with 3 Dashes.
To Half-Half Step: Jump, Dash, Slash(HOLD), Change, Dash(RIGHT AFTER CHANGE), Jump, Dash, Gun will shoot.
Slash-Step
A Move that lets you slash twice in one jump. This is a very versatile move.
To Slash-Step: Jump, Slash, Change to gun, Change to melee, Slash
You can switch up this move by throwing in dashes and the such.
Unblockable Massive
An unblockable massive strike. Simply turn around 180* when you encounter a blocker with a massive strike. They will get hurt by the massive, but they will still be in block mode, so you must aim at the feet.
"Instant-Kill"
The "Instant-Kill" is a move that uses the alternate swing of the sword. What you do is knock the enemy in the air, then aim at the apex of the knock, and fire. You can either then take this move separate ways:
Butterfly near landing point -> Knock Shoot near landing point -> Knock Knock and repeat.
Wall-Post
The Wall-Post is a move that I started to use. Half-Step off of a wall instead of the ground.
To Wall-Post: Jump, Dash at wall, Slash(HOLD), Jump, Change, Dash away from wall, Fire
Air-Reload
This can only be done in certain points of maps. It's basically sustaining yourself in the air while you reload, so you can keep yourself safe and/or get away at the same time, while reloading your gun.
Quickmedding
Quickmedding is a basic skill that allows you to drop meds twice as fast.
YOU MUST HAVE 2 SETS OF MEDS EQUIPPED FOR THIS TO WORK.
To Quickmed, keep running at a wall, take out the first set of meds, and drop it (HOLD DROP). Change to second set of meds, it will drop, then change back to first set, it will drop, then change to second set. Do this for how long you need to.
Slash medding
A rarely-used move, but sometimes helpful. It's just like a slashshot, but with a MedKit/RepairKit in the hand. In this move, you hold Fire till you hit the ground, at which the medkit will drop. After this, you should light step over the medkit to ensure you picking the medkit up. Remember that the medkit will drop in the direction you are moving, so make sure to plan your pickup in the way the medkit is going to move to.