Update the engine for TransforMice,
Better network computing mode, reducing the impact of the network on physical engines,
Inherit player information from TransforMice
TransforMice is still an excellent physics engine driven 2D online multiplayer game (even now in 2023), which is still competitive and difficult to find games of the same type (build, physical sandbox, multiplayer, mechanical, costume, platform jump, 2D), excluding multiplayer and costume, as well as platform jump. Bad Piggies is a better stand-alone product, Similar stand-alone games in the construction and physics engine parts include World of Goo, but the lack of multiplayer and costumes and platform jumping are the most needed parts.
In 2023, after 10 years of development, the affordable computer hardware and network for ordinary people have greatly improved

If it works with Terraria... Can't imagine