Here are some quick game ideas for the LD final round themes:
Alchemy
Match-3 game with alchemical symbols, target: match to philosophers stone
Another World
Create planet resorts to welcome star travellers on there vacations.
Break The Rules
Not-game where you have to dance to arrythmic music.
Chaos
“Battle of the wizards”-style game but in cyberspace with hackers
Choose A Path
Drunk Driving simulator
Connected Worlds
You want to make tea but the sugar is empty. Astroid-hike to your neighbors planet to ask for some
Day and Night
post-apocalyptic exploration in a desert, cold and warm balancing
Destroy The System
Android App: Everytime you drop your phone you get 100 Points, international leaderboards and local multiplayer
Don’t Stop Moving
Collect all 140 feet and battle against other feet-wearers
Do No Harm
FPS in \insert war here, twist: you are a pacifist
Fortress
Blocks are people and can be commanded(flocking), built fortresses to protect
Growing
Gardening simulator
Isolation
QWOP-style: wire different electronics
Lost In Space
Candybox/Populous crossover
No One Can See You
Puzzle Platformer with 2 modes: invisible and not invisible
Randomly Generated
CYOA Short Story generator
Strength In Numbers
Roguelike only with numbers instead of @
You’re Not Supposed To Be Here
Glitch-game where you have to get outside of a area
You Are Already Dead
Beach volleyball with angels in heaven
You Must Leave It Behind
Shopping-game where you have to choose between different items, example: something sustainable(long term, slower, more expensive) and something fun (short term, fast, cheaper), you then have to place the stuff in your house, which gets filled up, either way: you will just die in the end