in coinrun/coinrun.cpp [299:315]
void init_physics() {
if (game_type == CoinRunMaze_v0) {
default_zoom = 7.5;
} else {
default_zoom = 5.0;
}
gravity = .2;
air_control = .15;
max_jump = 1.5;
max_speed = .5;
mix_rate = .2;
max_dy = max_jump * max_jump / (2*gravity);
max_dx = max_speed * 2 * max_jump / gravity;
}