Ok,Ive been in the top leaderboards for a while now for several games now and normaly when I set a score generaly people are no where close, so i figure people are doing some things wrong, so here are some of my strategies to beating Hero by Night, Monkey Deathbot Roundup, and Cat. (i suk at cowboys and aliens, plus i cant find any strat except for having good eyes and luck)

Hero By Night
Ive found that to get the high score involves actualy beating all 3 levels, once you do that the game auto ends.
To do this you must never ge surounded by an enemy, if surrounded your body will be like a pingpong ball bouncing between enemies getting your ass kicked. Always have all the enemies to one side an then hit multiple enemies at once with hits.
You are faster than the enemies, so use that to your advatage. Plus, enemies seem to go slower moving up and down opposed to left and right.
Also, only use the superhit if your caught in a pingpong situation (you should be avoiding this), however if you want the higher score you should NEVER use it. Even though its cool and killing everything on screen in one shot, you get no points at all.
Also, try to remember when barrels or rats come and how to avoid those. With all that said there are the obvious things like, dont stand near fallen eneimes and time you punches right so the enemies dont hit you first(this should get better with practice). Good luck and tell me if anyone has beaten the whole thing besides me...
RapidoBlue's Highscore: 605,550

Monkey Deathbot Roundup
Ok, first thing ya want to do is increase your screen resolution to 1024x768 so the whole game apears on screen, to do this right click on your desktop, hit properties, go to setting, and increase your resoultion. The fist couple of stages should be real easy.
When it finaly gets to the point where there are too many monkeys for you to work it 1 at a time do this; gather all the monkeys to 1 corner, perferably the corner closest to the goal and then in one foul swoop trap all of the monkeys at once into the goal. With this strat you should be able to get into the 100,000 SO EASILY, and yet few people ever do. Since you trap all the monkeys all at once, the spider rodents are not even a threat.
this should go without saying but avoid the zombies at all cost. they cut your time, thus cutting off the points ya bank. You can keep monkeys in a corner and lure zombies away at the sime time by using a circling technique, quickly box the monkeys in a corner and then imediatly head in the opposite direction to leader the zombies away all in a circular motion (sorry if im not explaining it well but you'll figure it out I hope)
When the time is right (zombies are far away enough to not interfere with using the corner to trap them all in 1 swoop) gather and trap the monkeys.
RapidoBlue's Highscore: 324,629

Cat
Cat is fairly simple, you get points for zapping, lose points for letting Bosley hit the ground, when your score reaches 0, game over. Increase resolution may or may not help, shows the whole screen yet the target is smaller.
Ok,to get a really highscore you must find and hit the fishes, fishes burst out of fully poped bosleys and it hit, all boslys except for 1 go away. You cant win by having a million boslys out and try to zap em all, it doesnt work that way
Eventualy, you will get overwhelmed by boslys, at this point DO NOT go crazy with the mouse trying to hit them on. there is a bounce line, a line where bosley goes to an exact height after hitting the ground, take the mouse and stroll left and right on that line clicking on as many bosly as you can. Dont do this forever, you are still looking for the fish to get rid of them all.
With this strategy you can last a very very long time, so much as to get into the 100,000s but your clicking finger might get tired and you might get bored (ive only had the patience to get to the 20,000s
Hopefuly with this knowledge there will be more people who an get into the 10,000 area
RapidoBlue's Highscore: 26,350

Cowboys and Aliens Lineup
I dont know, you tell me, im not good
RapidoBlue's Highscore: 2,395

Good Luck people, I want to see people with higher scores.

cat and the monkeys are quite doable skillwise.
Those monkeys are CRAZY though!!
Edit: did i say crazy? i mean insane !! 38 monkeys now. /hope browser doesn't crash.
This stuff is bad for the heart ! Browser starting to lag as well
Whats annoying is that where you start sometimes you get hit by a zombie right away and lose 5000-7250 points pretty much right away.

40 monkeys with a circle in the middle was just too much >P


hero by night is a bit tricky.

the cowboys game is mostly based on luck.
though i find working from top to bottom seems to work ok-ish, working from bottom to top gives more combos but leaves you killing potential other combinations.
its a dilemma.

I am good, but not that good