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The game got me to panic and run for my life, getting the right atmosphere.
I kinda hate timed missions, but this time it fitted with the platforming and shortness of the game.
Visual look was nice and fitting, but not TOO original.
Music was a good loop, fitting with the retro visual style. It kinda annoyed me though that it didn't end or change after beating the game.
Game mechanics were OK, pretty standard on this site.
SPOILER: The ending was like a slap to the face. I think we would've deserved the good ending, as the game was short and I don't think the logic to getting the good ending was visible even to the brighter guys, for the first run.

Because this was such a short game I won't rate it. You have potential for making a good, longer and more finished game.

It was somewhat entertaining, however, I'm having trouble with the last level. There is constant jerking and sliding which prevents me form navigating the spike area.

OMG plz tell us where is the key to get the good ending?

this is a nice game... albeit not having cheese, but the entire game is a little hard on ppl... but basically it gets annoyin. good and not some 'press the button crap" but not worth ur time to see ending

It was an alright game. The sliding aspect is alright, but it is just frustrating and pointless. I like games where you stop on a dime so that's just a personal preference. I enjoyed how a level would change once you would begin walking back the same way after a dead end; but I have an issue:

I beat the game the first time through with the true ending or as you say:
"With a key in my hand."

Now I expected that beating the game this way would not only unlock the "TRUE" ending, but the standard "beat the game" medal as well.

I earned the true ending, but the "beat the game" medal wasn't given to me even though technically I did beat the game. Now if the other medal said "bad ending" and one said "good ending" then I would be okay with it, but as it is your other medal says "beat the game", which I did and still don't have that medal.

Now I have to play through the game again to get the less than pro ending, thanks.

Aside from that the game is visually pleasing and so is the music to some extent. (Though I turned off the volume because music distracts me.) So for a contest with quick levels it is good, but I still have some other major concerns as well...

First off: I don't press a button to start a level, it just starts. Every time I die it jumps right back into the action. Now I can completely understand your approach so this isn't huge which is why I cover it first, but I really need a response to see if you just didn't think about it or you did this intentionally. I'm curious as to why you made this decision.
Second, where is the quality control?
Third, why do you not have WASD compatibility? You do realize that WASD is possibly the most common hand control for people to use in flash games, right? I find it the easiest and not to mention the reason for the ability to switch between WASD and arrow keys is so that if you are left-handed or right-handed you have a control scheme that is within your favor.

Lastly, the opening sequence is in French? Don't get me wrong, I mean the tutorial was great and all and very self explanatory... but I still don't know what the start key was since I basically just pressed random buttons on the keyboard. Was it the space bar? I'll never know. All I know is if you had the time to put in the controls in the description box below for the game then you could have mentioned something there about the start button...

3/5. I loved the concept and even the general execution, but those small details are very important to me.