This is a boss battle game with multiple levels and a 2-player co-op mode.
Press the "Backspace" or "Delete" key to load the level-select window to select and reselect levels. Press the up or down arrow keys to cycle through the available levels. Some levels are "1-P" (1-Player) levels and some levels are "2-P" (2-Player) levels.
For single player missions, the arrow keys control movement and the "Z" and "X" keys do the player's attacks. For two-player missions, player one uses the arrow keys for movement and the "Enter" and "Slash" (key above the "Enter" key) keys for attacks, and player two uses the WASD keys for movement and the "B" and "N" keys for attacks.
Press "P" to pause the game. While the game is paused, hover the mouse's cursor over the portraits to learn about the current ship's stats.
There is a bug in this game that causes it to run slower over time. Close and reopen this app to restore the game's speed