Solved using the transform property

This is my first solution and I'm very excited to see what kind of feedback I would get from everyone. Here are a few things I would really like to know:

• Please let me know if there is a better solution to this problem.
• I'm very unsure of my css code organisation. Is css code usually written in a particular order? If so, please let me know how I can organise my css code better.
• I would realy appreciate if someone could tell me what milestones are good to make git commits. Also, how would I write commit messages.
• Have I made any mistakes? If so, please let me know.
• If there was something you noticed in particular about my project, please let me know. *All the feedback I will receive will be deeply appreciated.