Little Sara Sister Construction Kit was a Java program used for making the Little Sara Sister 2  Commodore 64 game released with Little Sara Sister Trilogy game pack.

It create an C64 executable with graphics, musics, texts and your created maps levels just with one click.

Source code of the game is available too and Java source code of the tool is available on request.

https://iceteam.itch.io/lss-game-contruction-kit

Interesting! Game-making tools are all the rage these days. Might want to link directly to the product page, to make it clear this is distinct from the game announcement you just posted.

Edit the post with link. Thanks.