What makes a good platformer?

So since my last 4 games have been platformers (just because there easy to make) I decided that I mush PERFECT the platformer genre. So what do you guys think makes a great platformer game?

Here's a list of what I think makes a good platformer game. Sadly I can't achieve these standards myself (mostly graphic issues). making a "good platformer" isn't half as simple as making a "plaformer"

-Exceptional graphics
-Somewhat explorative level layout
-SPECIAL EFFECTS! (E.G. little fli sized bugs, lighting, interactive terrain[such as movable litter or objects], and BLOOD)
-Non-clashing graphics and sound
-Sound that fits and LOOPS well with the concept
-advanced programing (E.G. Store, upgradable weapons, ability to pick up new weapons, interactive terrain[such as fireballs coming up from lava or water, stuff like that])
-CAVES! CAVE ARE SO AWESOME! I LOVE CAVES! CAVES CAN GIVE GAMES WHOLE NEW TWIST! THE PLOT CAN CHANGE IN A DARK EVIL CAVE! CAVES GIVE SOOOOO MUCH OPPORTUNITY. PLUS IF YOU DO IT RIGHT, YOU CAN CHANGE THE GAME FROM A SIMPLE SOFCORE GAME TO A HARDCORE KILL'EM ALL TYPE GAME! I LOVE CAVES!
-Most important! Addictive gameplay and something unique!

These are just my opinions, I hoped they helped.

...and Warzone Games's best point of a platformer is caves. Bravo. *slow clap*
Also, blood. (FUCKING BLOOD IN A PLATFORMER SERIOUSLY?! WOULD YOU LIKE BLOOD IN GAMES LIKE FEZ AND MARIO BROTHERS, NO!)

Blood? Obviously you haven't played Vox Populi, Vox Dei.

Platformers need good controls. Most important thing is how good it feels to move, because they're all about movement.

Whats wrong with you people! Blood is always mandatory, whether is a Barbie makeover game or candycrush, blood always makes things better! Blood FTW!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I JUST FOUND MY NEW FAVORITE GAME! TY HECTATE!

You see Hectate knows his stuff, good controls are key.
Blood infact, does not make things better.
Also, blood in Candy Crush will not make it better. No.

You see Hectate knows his stuff, good controls are key.
Blood infact, does not make things better.
Also, blood in Candy Crush will not make it better. No.

By that logic, because adding a gun to Mario Brothers would make it worse, having guns in a completely different genre is obviously not viable. I don't think candy would make most games better, does that mean Candy Crush shouldn't have candy?

tl;dr blood is the best add blood to candy crush lets make a petition

Also make sure you keep in mind your collision boxes.

@ All blood lusting awesome people. Tell me if my "Candy Jam" game satisfied you thirst for blood, and brains. http://www.stencyl.com/game/play/24016. Object is to crush King employees with giant candy, and along with that, brains and blood gush out
 
 
I think another important thing in a good platformer is a great story. A games no fun with no point.

Im sorry, But "Candy Crushing Saga" does not fulfill my thirst for blood. Or entertainment for that matter.
@Raiyumi Thats good too
Okay Mr. Warzone, I'll give you that, a good story always good.