Rules
This is real-time chess against a computer. It’s not turn-based like regular chess.
Instead of capturing pieces, your pieces fire bullets to destroy your opponent’s pieces.
The first player to destroy the opponent’s king wins.
If an enemy piece lies within your player’s reach, your piece will automatically fire a bullet.
Piece movement and use of your pieces are almost the same as in regular chess. (However, pieces on the board do not teleport; they move slowly, gliding.)
En passant and castling are not allowed.
The pawn attacks diagonally forward, but cannot move diagonally forward. The pawn can only move straight forward.
The beeps you hear occasionally in the video above are the sound made when the piece is unable to secure the square it is moving to. This is because the piece cannot teleport. This is the same for both the player and the computer.
Difficulty level
There are Easy, Normal, Hard, Expert, Special and God levels.
At all difficulty levels, the strength of the player and computer pieces and bullets is the same.
3D data of chess pieces
“Chess Set” by Luna Szymanska (CC-BY 4.0)
Link

Google Play Games
You can now play on PC using Google Play Games.
https://play.google.com/googleplaygames
After installing and launching Google Play Games, search for “Shmup-Chess” in the app.