pub const game.direction_up = 0
pub const game.direction_right = 1
pub const game.direction_down = 2
pub const game.direction_left = 3
pub const game.direction_still = 4

/*
; 1_000_000_000 nano second = 0x0000_0000_3B9A_CA00
pub const game.tick_duration_0 = 0xCA00
pub const game.tick_duration_1 = 0x3B9A
pub const game.tick_duration_2 = 0x0000
pub const game.tick_duration_3 = 0x0000
*/

; 0.5 second = 500_000_000 nano second = 0x0000_0000_1DCD_6500
pub const game.tick_duration_0 = 0x6500
pub const game.tick_duration_1 = 0x1DCD
pub const game.tick_duration_2 = 0x0000
pub const game.tick_duration_3 = 0x0000