A couple of things that might help with strategizing:
- Some form of look ahead or zoom so that you can plan your attack. At the moment you can only scout ahead by moving the King, which then usually draws aggro from any pieces that you encountered.
- Make square color more readable around King. The movement and rage highlights can make it a little hard to identify which color square you and/or your attackers are on. With bishops, for example, it's important to stay on the opposite color to the attacker.
- Highlight enemy attack squares (maybe if you mouse-over the enemy?) This is particularly necessary for pieces like the Rook, Bishop and Queen, which can move the length of a chessboard in a single turn, but which seem to have limited range in your game. At the moment, if you're being attacked by a Knight with a Rook and a Bishop moving in, it's hard to know which squares are safe.