A great idea, but it could have been better arranged, A little more light on the subject would also help.

I changed it up a tad.

much improved

ty, ski

Pretty scary dinosaur

the light on the left (candle) is distracting a little bit,
but for the whole theme, very inspiring setup

Thank you! I admit it's not perfect for me... Someone could make a better composition with the same elements but I didn't manage to...

Well done on your attempt. Other than the distracting light, the background is a little busy - I spent longer trying to make out the cigarette in the test tube in the background (reminds me of a year 9 science experiment). Anyway, in my opinion the simple backgrounds work best.

Thank you for the advice FallingHorse. And the "test tube" is a really nice thin bottle, but too high to stand up ^^
Seems that my picture is not on the road of "victory".

Lol author - in my view, the real victory is being able to accept constructive criticism for what is and taking a little something away from it. That makes you a winner already