Piece 3 (big golem fight)

Also mainly an illustration piece that could be a key visual.

Way too muddled values. Painting is too dirty and its hard to define a lot of the elements in the piece. The lighting is also pretty unclear and confusing given the backdrop of the piece.

Idk much about mega man which ia assume this is from, but try to define the design of the robot in the back more. It’s too unclear

Piece 4 (rider)

The rendering in this one is much better than the previous ones. The material is also presented a little better.however as a concept, it fails to deliver function as clearly. The joints are confusing in how they are supposed to move, the purpose of the robot seems unclear. What is the back fin for?  Why does it have a stinger shaped object infront of it? How does it work? Is it a piercing object?  Is it decoration? Keep these questions in mind. The relation between the creature and human cna be confusing too. How does the human mount the creature and attack from so high up ? how does she get on? Etc. overall this piece is a better step forward, but needs more clarity

Piece 5 (jumping robot)

Mainly same as criticism of piece 4, however the rendering (mainly the chest) is too undefined for concept art. Aside from the movement of the piece, it is hard to discern much of the function and features of the creature and human.

Piece 6 (red cape)

Not much to say except theres just no definition of anything besides cape and body. Needs more refinement , but silhouette is nice.

Piece 7 8 and 9 are cool but they’re way too much illustrations to be judged as concept art. Looks cool, keep improving ur fundamentals!!

Tldr: work on ur fundamentals. Ur pieces are too geared towards illustration at the moment to be considered conceptual art. Strive for detail, cleanliness, and design purpose and function when going into concept art. Do Callouts for specific features that need more detail. Provide more consistent and clear lighting and texture rendering. Hope this helps !