Even if I didn't get past the first level I had a good time playing this game. VFX and SFX are wonderful and I really like the richochet mechanic, that's like a Revolver Ocelot Simulator XD
That said I found the difficulty curve really tough and personally I'd change the color of the walls because in my opinion a red wall is more related to "Danger" than "Rewind" (but that's a minor issue).
Fantastic game, anyway!