The datapack is up to 4905 commands. Honestly, that's less than I thought it'd take to simulate 3D rigid body physics so accurately. With everything else implemented, it only took about 10 commands to add Buoyancy.
Ever notice how certain Minecraft mobs are shaped almost just like Tetris pieces? @MrMakistein and I did! Here's a video about our Tetris minigame in Minecraft! youtu.be/U9uJEwzUOso