For beginner, I really like this. Nice touch on different elements of art. Very details and nice work on robot, dude. I like it. So, I don't really see any necessaries to change anything. I like how it look expected "!" and "?" like you told but don't worry about it. Just improve it and you will be fine anyways!
Thank you really much for your response! Don't worry, I will not be putting icons in drawings anymore xD.
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