// All movement is based on t_frame.
// All speeds are pixels/tick, with 20 ticks per second.
extern float t_frame; // length of this frame (in ticks = 1/20th second)
extern int score;
// All movement is based on t_frame.
// All speeds are pixels/tick, with 20 ticks per second.
extern float t_frame; // length of this frame (in ticks = 1/20th second)
extern int score;