Nice puzzle game! The pixel art is clean, the on-screen key legend is helpful, and the fire-burns-the-crate-wall moment in level 2 is a great fit for the chain reaction theme. Instant reset and rewind are very welcome in a pushing puzzle. One suggestion: level 1 was a bit confusing for me because blocked pushes give no feedback and the fog hides the path, and the ARROWS counter at 0 is not explained, so a small hint or a gentler first level would help. Good job!