The type is bad. work on the kerning of the UP. Its spaced out too much. The typeface on the back of the shirt is just bad. It looks 70s but not in a good way. The illustration is kinda boring. The umbrella looks messed up and the logos on the umbrella are skewed funny.
It looks like first year design student quality work.
You wanted opinions. Not that I work at a famous ad agency or anything.
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