It would be nice to see how many centipawns I lose when I make a wrong move.

It's strange that in the easy levels the move is to take a piece or something like that. I think it's not usual in the chess puzzles because it's too easy to spot. I make a few mistakes for that. :( Fun project anyway.

Very good.

The one thing that would improve it for me is to be able to step through the analysis. The animation is much faster than I can think.