Wow. Wow. The first level is really clever and totally makes up for the lack of instructions.
Sprites and animations: Great.
Music : Great.
Sound: Great.
Difficulty: Perfect. The addition of the blank spaces is brilliant.
Controls: Good. I'm not sure if it's supposed to continuing to move on it's own sometimes or if that's a bug. Either way, I adapted.
I am stumped on a level and I'm leaving that browser tab open until I figure it out.
I sincerely hope you win.
Wow.