This is my first critique, so please be easy on me.
The vibrant colors with the shell blend very elegantly with the flowers it's adorned with. The smudgy background really suits well, mainly because of the random and bubbly attitude it brings. The placement of the flowers is also very well executed. I like how the reflection is smudged too, it lets you pay more attention to the main prize while allowing you to understand it's a reflective ground. I must say that I really love the work you put into this, and the colors used.
For originality I gave you 4.5 stars. I've seen more snails with forget me not flowers, so that's why you don't have 5 ones. The colors, the position and the whole idea are so original, never saw it before.
For technique, also 4.5 The colors are perfect, but I think the snail house could be a little bit less blue. I also have the idea you sharpen it too much..? The composition is great, I totally love it. I would prefer a bigger square like 600x600 but that's personal ofcourse!
For impact also 4.5 stars, it's breath taking and the colors take over your eyes!