In light of [@ian-kettlewell]{https://ldjam.com/users/ian-kettlewell} idea of suggesting ideas to get people thinking about the themes, here is my 2c

Cards are your weapons

https://www.youtube.com/watch?v=zwY1i1cR-VM Standard JRPG

What about a ground-hog day were you can't remember the game word between daily resets. You need to create notes (on cards) to yourself to solve problems.

The bufferfly effect

The weather is the same everywhere every day. Constant drought or constant flooding. We need chaos causing weather butterflies!

Only one enemy

Escape a mirror you.

Fight a giant fungus (appears above ground in many places but is the same creature)

Light as a weapon

Starwars, Any Vampire game. A really brutal dieting regime. Airships pirates ("Weight then down and send them to Davie Jones")

One room

Classic escape room. Papers please. Basically make you character stand still and bring the game to the character.

Regular jobs, but in Space

Make a sandwich but all the ingredients float around.

The environment is a weapon

Bar fight, everything from tables and chairs to wall, light fittings and the bar can be used to injure. Populous; strike your enemies with lighting, floods, earthquakes, like the vengeance of an angry god.

Change the genre of a classic video game

'Strip poker' manage a Las Vegas casino in a business sim.

'Doom' The real time strategy game.

'Rimworld' racing game.

'Secret of monkey island' cooking game.

Take a lovable plumber from a platformer and put him in a racing game ;)

Decay

Murder mystery in a haunted house.

Stay in the dark

Vampires again.

Sith lord tempted by the light-side of the force.

Side effects

Puzzle game, push one block another moves in sympathy.

Can only move sideways.

Two-button game

Rhythm game?

Platformer/puzzle game but jumps, spikes, traps, block puzzles, monsters and of course exactly two buttons.

Time is the currency

The past it threatens the fastest weapon, you wouldn't make it past a second. Sorry I don't know what came over me.

Thyme is the currency?

Risky power-ups

Running short of inspiration, but you get the point.

Permanent damage

Perma-death

Don't let it escape

Just don't let it escape.