Earlier this year, Roy Templeman (aka loudscotsbloke) released a brand new game for the Mattel Aquarius.
Aquariworm was originally released as a physical cassette in parnership with Chronosoft, and it now available to download from itch.io.
The game is a take on the classic Snake game, and requires an Aquarius with at least a 4K RAM expansion.
You can download the game here.