Here are a small handful tips you can use to win your matches in stickfight!
Lets start simple:
It's not a block, it's a counter. Only use it if the enemy has a weapon, and you're unarmed, or if your enemy has an autoclicker on their light punch, as it will be easy to predict when the next attack is coming
Shoot in short bursts, or with weapons with high recoil (say, the revolver) shoot once and wait if you're trying to aim.
Also, note that the direction you hit will move the enemy in that way. If you hit down, the enemy will be pushed down. If hit up, the enemy will be knocked up. You can aim your attacks by aiming in the direction you want to go. This is useful if hitting enemies into spikes.
(Tested once, needs confirmation) If a normal bullet hits your sword, and only your sword, the bullet will be blocked.
On a similar note, deflecting a bullet into an enemies gun will disarm them, or shooting it. Also, tested once, if an enemy is standing still holding a sword, and you hit the sword, the will be disarmed.
Headshots do extra damage for almost everything, including fists (testing needed!) Sniper will 1 shot unless the HP is 300, maybe 200.
Now some map tips, again, starting simple
The ice in the winter maps can be broken, and if larger pieces fall on an enemy, the enemy will take decent damage. Also in the winter maps, you can hit enemies through ice walls if you are close and the enemy is hit hard enough. Ice may even fall on them, doing extra damage!
Finally, on the winter maps, the snake launcher WILL break ice VERY easily. If it is shot at ice, if it rams through ice to get to a player, etc.
In the factory, the laser cannons on the unstable platforms can be aimed by holding down on an edge of one. Be careful, though, as if you fall it will swing back and blast you in the head.
On the wild west map where the snake pit has AK's inside with snake barrels, only rush at the beginning to get an AK, then get out right away! You WILL die if you take too long or fall in!
On the conveyor map in the factory, you can get across the gap by jumping across, altho it is very risky, or you can jump on a box then jump across the gap, making it much easier.
In the castle map, you can hold down to slide through a drawbridge, taking an enemy by surprise. I have won by doing this a ton when I have a sniper rifle.