// if there is a collision with anything solid, bounce off of it

if (hspeed != 0) {
    if !place_free(x + hspeed,y) {
        move_bounce_solid(true);
    }
}

if (vspeed != 0) {
    if (!place_free(x + hspeed,y + vspeed)) {
        move_bounce_solid(true);
    }
}