The element that amazes me above all the others is without doubt the perspective: normally I find it difficult using centered vanishing points and squared rooms, but you managed to do it with a round and even curving tunnel and a decentered point: nothing short of impressive.

Raphael too is in perspective and his pose is clearly crouching and even if you can't see all of his body, you can easily imagine its position. The texture and colour tone are well detailed and clearly separate the shell from the skin. The muscles are defined and give the character a solid body structure and weight, which helps with the dynamicity because it adds inertia to the movement.

Other details which "speed up" the painting are the belt, the bandana and the fading colours, but the element with the most importance in it is the interaction with the water, which is slow along all of its course except where he rides and jumps out of it, rendered very realistic.

From a personal point of view (more personal than the rest), I like the detail of the sai scratching on the roof: combined with all of the rest, it seems to me to hear its screeching sound.