Great puzzle game with a nice concept, and tons of puzzles to do.

The only things I'd like to see is different music every 50 puzzles, and more theming than just black/white. Also, the puzzles are a bit all over the place, sometimes, there's a stupidly easy one, then one that will block you for 5 minutes, then another easy one...

It'd also be better if certain puzzles were grouped together in bundles of 10 or 20,  rather than having all 500 puzzles in a row.

Otherwise, had a ton of fun clearing the first 200 puzzles for 30 minutes! Will complete the rest afterwards for sure.