So uh, i went quite far but i didn't finished all level, some are really difficult and i only solved them with luck, some are quite simple, but the main mechanic is intersting, though i feel like it rapidly become really hard, and that there's no a lot to learn to progress, different tricks to do certain type of alignement, but it's about it.
It makes a good puzzle game though, one of the only entries i didn't finished.
The graphic style is simple but effective and gives room to them complexity of the moves you gotta do.
I don't really have a lot to say except that you made real hard levels here