Happy belated birthday! For some reason I thought you were older. Like in your 30s. Don't know why.
What engine are you using for you game? If you have your heart set on a platformer, try Game Maker. It can be expensive, but it's accessibility is worth it. I've been making a Symphony of the Night Clone for about 4 months now, so I know how difficult it can be. Especially troubleshooting and work out where something went wrong.
When you have something that's playable, send me a link, I'd love to play/give feedback.