Attractive images could be good, but up to you. The button to click on MUST be prominent, and that's where we want the reader's eyes to go to first. Button can be above text, below text, to the side, etc. But ideally should be above the fold (i.e., at the top of the page when you first open the site).
About 68% of our traffic is on mobile, so design will need to hold up well on mobile as well. However, desktop remains our most important traffic, as the majority of revenues come from desktop, so vital things look good on desktop too!
If you use a logo anywhere on the page, please use our current logo (at the top of the site). Feel free to change colors as needed. No need to include the logo unless you want to include it, however.