The spikes were very frustrating until I realized I could still undo after reloading. The "you died" screen in general is a bit unnecessary, too. Most puzzlescript games I've seen just have a death sprite show up or something, so that you can undo right away.
That minor complaint aside, it is a cool game, and I did enjoy it.



There appears to be a glitch in level 3. It's advancing me to the next level even though I haven't moved the white stone into place yet. From the state in this image, pushing the red stone 1 space to the left will complete the level.