this is a lovely idea!
I struggled to get through the first level but i managed my way through it eventually, the second level felt abit nicer to the player
I managed to cheese the enemy by jumping over him at some points, not sure if this was intended as i couldent get the attack option to work!
A few questions or suggestions that I didn't see
1: a way to delete old signs
2: an animation for the attack? this might be happening but I didn't see one
This is a really creative game, reminds me of lemmings meets game dev so props to that!