Oh man I'm getting such a cool Donkey Kong vibe!
Sadness tends to be useful for me, especially when making music. Seems it is for you too!
That lead doing these glorious bends, it's beautiful. And I really like how more leads come in and join the main melody, making it a bit more complex and even catchier. Also, a piano always blends the more digital sounds in such a delicate way. Wise choice adding one!
Great job with the drums. They take the melody to a more uplifting state, if that makes sense. And when they're absent, at 5:53, it's really cool how it suddenly gets back to a more contemplative, sad, nostalgic feeling.
Excellent, keep it up!