I would classify this as a good start. WASD and/or arrow keys for controls would be better, however, and as-is it's rather short and simple.

Tried to clik anything, any keys to use.??

Good as a proof of concept, but needs a lot more polish and depth.

Here's A Review:

The Pros:

Game Mechanics: Eh, Could Be A Bit Better. I Would Rather Prefer To Use The Arrow (Or WSAD) Keys, But Oh Well, I Suppose The Cursor Also Works. Making The Game Shorter Would Also Help.

Concept: Though You Aren't The Very First Person (Or The Last) To Use Symmetry As A Game Mechanic, I Suppose I Should Still Admit That It's A Pretty Creative Idea.

The Cons:

Graphics: Sorry, But... Most Of Them Aren't Good. The Main (And Only) Characters Have A So To Speak "Horizontal Cut" Between The Mouth And Eyes... And Those Eyes! Why Do They Look So Tired? As For The Other Assets... I Suppose The Keys And Gems Look Well, But The Skulls... Though They Look Pretty Good, I Think They Should Be Replaced With Something Else, Like, I Don't Know, Spikes? Yeah That Sounds Like A Good Idea. Oh, And Before I Go To The Next Section, I Should Tell You That The Background Is Too Blank For Me. You Really Need To Add Something To It...

Music: Err... I Mean, It's Not Bad, It's Just That... It's WAY Too Simple For This Game. You Should've Tried To Find Something Else, Something Not So Simple. Something That Can Reflect The THEME Of The Game. But To Get The THEME Of The Game, It Is Needed To Get The STYLE Of The Game, Something I've Already Talked About At The Graphics Section.

OVERALL: This Game Needs A Lot Of Improvement, So Here's A Helping Hand: First Of All, Think About The Graphics; Make A Better Background Witch Has Relations To The Stage Itself (As An Example, Think Of An Underground Stage In A Underground Background, A Cloud Themed Stage In A Cloud Themed Background, Ect.), Second Off All, Find A Music Track Which Fits The Game's Theme Along Side Sound Effects To Make The Game More Enjoyable. And, At Last, Make The Game So That Not Only The Cursor, But Also The Arrow And WSAD Keys Could Also Be Used To Play. Making The Game Longer Would Also Help To Make It Better. That's All!

E.O.R.(End Of Review)

though short, that was cool