I am not really sure where the theme sacrifice comes in, in this game. I also didn't really get the purpose of the other blocks they just seemed like things to avoid. Are the mazes procedurally generated? Since the maps seemed very similar it got a little boring. I liked the map getting revealed, but I felt there needed to be some obstacle trying to prevent me from finishing.

Sometimes i'll just pass trough a corner, which breaks the purpose of a wall... The music is well chosen, but I find the game off-theme and without enough gameplay... Maybe add a moving block, only visible when on explored terrain, that will begin to attack the last block of the chain ?

Unusual visual. Somehow I was expecting something according to theme. Smooth controls, maybe i did not get your game in the way you want.