Wow for your first game ever this is really impressive! The platforming feels so smooth and the visuals are really well done! The line connecting the characters was also a really nice touch since the main issue I've seen with these asymmetric platformers is that my focus gets split too much to have fun, but that really helped solve that with some pretty clever design.
Please don't stop developing games, if you can do this in a week I can't wait to see what you can do in the future.