Pawn on E7 is still showing on the board making it impossible for the Rook on E1 to move to E8 in order to checkmate the King on D8. The algebraic notation is correct. However, the AI incorrectly moves the C pawn instead of the E pawn on the 1st move.

Game boots up fine, and mouse works as I can adjust volume and other settings via mouse. But Level 1 simply shows a board with "Black must win in 2 moves" and a "Press <arrow symbol> to begin". I click the arrow and all the pieces disappear and a "... h6" appears on right side, with a "Press <refresh cycle symbol> to reset" underneath now empty board. Clicking that just cycles back to original board with pieces again, but nothing I click on the board highlights or moves, despite that appearing to be how it...

"f x e6" puts the Black King in check.

Move anything as the first move and it just resets.

So far, I've seen only one "major" problem is on puzzle 37. It says exd6 but it shows cxd6. Edit 1: If you press multiple times and quickly enough the "start" button, it gives you the first move that you need to do. Edit 2: Puzzle 149, it says fxe6 but it shows dxe6 P.S. I'll edit later if I find more....