Some visual problems

1. Yes, can be done with CSS. You can define a new color or its default, e.g.:

div.bonus {
    background-color: initial;
}

2. There is no out of the box option to disable the links. You would need to write an extension for this (in PHP) that overwrites the templates that show these links (e.g. ranking). A low tech solution is to change the Plugin Pages option ‘See a user’s predictions page’ (it’s the last one on the options screen) to a different page, e.g. the statistics page.

3. You can hide it with CSS:

div.bonus span.nr {
    display: none;
}

Thanks! 1 and 3 worked, and r 2 I’ll try. How can I make the gray background disappear from matches too?

If you want to change the styling of the plugin, it’s best that you use the devtools in your browser to inspect the element and change the CSS to your liking. Then, when all is good, copy the new style rules to your stylesheet. I can’t help you with all changes that you want.

I put this code in css and it doesn’t work, that’s why I asked you:
.match-card {
background-color: initial;
}

You are doing a wonderful job with this plugin. Thanks!

That’s because your rule is not specific enough to override the one from the plugin. This will work:

.matchinfo.new-layout .match-card {
    background-color: initial;
}