As the title states, it would be great if you relocated the “Remove this Submission” button to somewhere much less prominent (I’m thinking smaller font somewhere near the bottom). The styling and position make it far too easy to accidentally press, which I’ve seen result in the deletion of many games post-submission deadline.

Given the contrast between the background and the text, the “Remove this Submission” option is actually clearer and more intuitive to press than the edit button.

Edit: a word.

One problem with relying on a confirmation dialog is that people are so used to clicking through them that they might not even consciously register the dialog.  I can't say that this has happened to me, but I can say that I've clicked through more than one confirmation dialog before I was able to stop myself.