Additions: - Ancient Fortress: A massive ruin guarded by thick walls and beam turret. (I plan to spawn a boss at the center, but the boss is not yet implemented) - Ancient Suicide Drone: Mainly appears inside the fortress and explodes at a certain distance when it approaches the player. - Yellow Slime: Eats almost all substances excluding gold, silver, glass, etc. - Repair Filler: Obtained by combining raw rubber and yellow slime. It can restore the durability of objects through a bonding operation. - Additional display items have been added to the right-hand window, such as the speed of an object and descriptions of substances. Adjustments: - The algorithm for determining the cutting direction of an object has been revised to make it easier to cut in the targeted direction. - Made sure that the speed of an object is not reset due to cutting or separation. - Increased the maximum rotation speed of an object from 4 rotations/second to 8 rotations/second. - Increased the torque of engines and motors at low speeds. - Made sure that the moment of inertia tensor (ease of rotation) of objects containing substances with different densities is correctly calculated. - Added VFX when an object takes damage. - Changed the green slime's behavior to prioritize attacking over feeding. - Increased the maximum size of the objects that can be eaten in one bite. - Made other minor adjustments. Corrections: - Fixed a bug where the generation size of pyrite was not an integer cm. - Fixed a bug where the color of the distant view would become strange when the time was reset.