Hey awesome game! The style and ambience is great.
Mechanics are nice and simple. I like how you can override cell behavior, but if you're far enough into a level, you may be doing so at your own peril since they move relatively slowly.
I think I agree with most of the feedback here, in a more polished version I think an immersive tutorial would be critical given your minimalistic approach. I do think that the level up does not really feel like a level up, I actually thought I lost the first time, and then realized what happened (could be just me).
Following you to see the final version of this!! Keep it up.