5 Ideas for Each Theme

Decay * Fix a tower crumbling tile by tile * Radioactive decay * Play as a mushroom? * A sped-up gardening game about creating dirt * A word puzzle game where letters 'rot' into other letters

Layers * Move overlapping paper to make shapes * Shift the tectonic layers of the planet * Cake building game * Play as a rolling circle, gain layer of stuff. (Katamari?) * Play as a brick layer * Mystery game sorting through piles of photos and papers

Control the world, not the player * Control the weather * Click and drag to move the world around a character. * Astronaut goes unconcious. Save them by moving the space station around them to get them to safety. * Terrain is springy. Drag it and release to launch the player or objects. * Marble rolling game

Nomad * A game about bus / train hopping. Manage budget to reach goal. * Play as a migratory animal of some sort. * Travel through a procedural world trying to stay out of the rain. * Find a home. * Try to overcome anger.

Connections * Something about social network friends * Thought-piece about 'Connections' in the time of Covid * Connect cities via transit * Manage electrical wires between buildings * Guide a character to make friends

Stuck in a loop * Escape a 'time-loop jail' * Figure out how to break some sort of cyclical system * A racing rogue-like where you move onto the next level if you win the lap. * Try to construct inescapable loops for an AI * Find and correct infinite loops in code.

Feeding the monster * Minigolf on top of a monster's face. Aim for the mouth! * A factory to feed a creature. * Manage a society that requires constant sacrifices to a monster. * Struggle to break a bad habit. * Prevent your teammates from 'feeding' the monster and making it stronger.

Delay the inevitable * Water is flooding. But try to block it. * Fight old age with: a time machine, weird remedies, etc. * Manage a bankrupt company so your employees don't get laid off. * Add support beams to an increasinly overburdened building. * Try to resist eating the last donut

Contain it * Zombie outbreak management * Horror tower defense trying to contain an unknown creature ('it') in the dark. * Play as mother nature trying to use disasters to set back humanity. * A game about moving homes and packing memories into containers. * Play as a vampire trying to live a regular life without giving in.

Day and night * What if day and night were roommates? * Create a garden that works both during day and night. * 'Day' and their protector 'Knight' * Schedule a worker's day and night shifts when they have increasing costs. * Flip between day and night with a button press

Shipwrecked * Tower defense trying to setup traps for ships * Play as a siren trying to lure sailing ships * Jump between floating pieces of a wrecked boat. * 'Shipwreck' in space. Boost between chunks of spacecraft to reach escape pod. * Combine with the "stuck in a loop" theme and figure out how to prevent or survive the wreck.

Clockwork * Adjust clocks that control how fast different elements of a level move. * Play as a clock-person looking for gears needed to control time. * Platform through a giant tower to wind the clocks. * Use gears and levers to build machines to complete a level. * A game about a Casio watch.

You can't save them all * Increasingly absurd trolley problems. * Twitch reaction trolley problems * Try to save some candy for later without the kids stealing it * Earth is Dying. Repeatedly choose groups of people to try to start space colonies. * Your computer is about to force update but you have tons of programs open. Don't lose your work!

Death is not the end * Play as multiple generations of a family * Defeat death to return to life * Reflect on memories of a loved one * Each life lasts 15 seconds, but the body solidifies in place creating new routes. * Escape your terrible accounting firm job that somehow also has a branch in Hell.

Summoning * Hackers have found demonic energy in the deep internet. Harness Cyber Necromancy! * You are the least appreciated of the grand witches. You can only summon marshmallows. * You are a demon that's repeatedly summoned to rapidly accomplish menial tasks. * Draw arcane runes to summon things. * Try to fix a possessed alarm clock that summons demons. This is NOT what you signed up for!

The world changes when you are not looking * Encourage people to take a break from their computers * Time only progresses where you're not looking * Manage security cameras. Only a few can be on at once, but stuff happens on the ones that are off. * A spot the difference game about visiting your childhood home. * Try to balance spending time with family while working a job to provide for them.