Woah, you really nailed the retro theme, at the same time it looks really visually appealing and well done. The pixel art on top of realistic background looks great too! The concept is super clever. I especially like how you can collect blocks to rebuild the platform. The only slight issues I had were that I couldn't tell what the little green sphere between the right and center platforms was... and I also found the how to play screen really hard to read. I totally get you were going for the retro vibe with that too, but I'd recommend either changing it from green to white, or adding spaces between points. :)
Good job!
-Sasha