So I've been here 2 years and not even realised there's a wordsearch lol but I've taken a look and all you need to do is save the image to your computer, colour in the answers using paint, and then reupload to imgur.

If I'm not too late for you, here's a step by step:

1. Open this link Wordsearch. Right click on the image and select 'save image as' select desktop, and save.
2. Find the file on your desktop, right click on it to bring up a menu. Hover the mouse over 'open with' this will bring up a sub menu of programs that can open the file including 'paint'.
3. Use paint to highlight the words (you'll have to figure this one out properly yourself as I don't use paint, but I know you can select different size brushes and colours using the top menus, and you can undo an error using the arrow button at the very top left.
4. Once finished, go to File > Save. The image is now ready to upload to imgur
5. Go to imgur.com/upload where you'll see 'drop images here' Either drag the image from your desktop, or use the 'choose photo/video' option to locate the file. If you use this option, remember to use the left hand menu to select desktop, and then the image will show on the right.
6. Once uploaded, copy the URL of your completed wordsearch and send it to Pixie

Apologies if I've given you too much detail/not enough, I just assumed your knowledge based on your comment about not knowing how paint works. Have fun with the crossword!