[into the T]

i would like the squirrel isolated from the background

i like 3, but it has not been cropped properly and is on an angle
i would let the bridge deck end where the pillars end

4 has possibilities, get rid of the orange square and include the full length of the bottom two black elements

you can put your art on actual t-shirt mockups, so they will give you a better idea of how they will look (free here)

 

[into the T]

Not sure what you mean on the pier and how it should end Got the squirrel separated, and more black blended in to edges of lady with red.

i would do just the squirrel

here is the pier/dock/wood platform ending