Hello, welcome to the Buildbox forum, please see several tutorials before asking questions. https://www.buildbox.com/tutorials/ https://www.buildbox.com/buildbox-1-tutorials/ https://www.buildbox.com/guides/ https://www.buildbox.com/manual/ And very important, use the search engine. Could you put a link to the game? We are not fortune teller.
You can use any image editing program, (Paint), then drag that image to BB and go. I insist, check the tutorials before asking questions. Use the search engine. https://www.buildbox.com/forum/index.php?threads/balls-vs-blocks-top-charts-our-replica.10311/