An interesting experience, and a likable one - especially for one so short.
My favorite thing about it is the crisp, simple, yet effective graphics. I honestly felt engaged and pulled in for this brief little browser game, due mainly to this.
The way the tiles move in the "die" ending is especially engaging- again, for something so low-bit.
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I know this is just a small project for you; it is, all the same, one that impresses me, and inspires me to go ahead and learn the next thing(s) I'd like to learn about game-making.
Keep up the good work.