Good idea, nice visual design, colors and sound. Intersting puzzles not obvious, make me strained, very cool! But I'd add checkpoints after each puzzle. I understand that game is not very long, but it depress when you explose and need to start again, from the very begining.
2) One more little problem. It seems to me camera is too high when you run and jump, so you see only the top of platforms. After jumping you do not see the place you need to drop. And I often fell to hell (I know I have crooked armes), not dofficult but sometimes annoing.
3) Maybe it's a bit strange that you couldn't move the platform when Fred is on it. Why not? It helps to save a few seconds.
Thank you for your time and labour!