In reverse order.

 

Insufficient contrast for nav

 

Insufficient contrast of text over plant

 

Add prefers-reduced-motion to CSS

Add correct semantic tag for footer

 

A few links are missing correct markup.

Probably shouldn't use two <br> tags in a row.

First heading on the page should be h1.

Images should use descriptive alt text.

 

Should use header & nav tags.

 

html language should be en.