Fun game!
That's really cool that you and your brother teamed up on making this - ALL of the assets too. Nice job. I wish I had started designing games at 16. I really enjoyed that each level felt sort of like a puzzle, and at first it seems really hard, but there's a trick to getting by some of those obstacles. There are some really smart game design decisions in there. Nice job!
I would love to see some sound effects added in there.