This is my idea for my first game. A simple little game that would be a cave RTS. One side is a swarm based bug faction and the other would be the standard human faction. This would be a vertical 2D (platforms) map. The human player would have to build ropes and use jet packs to get their forces around while the bugs would just run on the walls and have flying variants. This wouldn’t be a very complicated game. Not many unit or building types but that’s why it is a bigger game. The humans would have a rifleman, a shotgunned, and a juggernaut (super tanky with a rapid fire shotgun). The bugs would have grunts (small, no cost, spawn hives), stingers (flying ranged unit, expensive, high damage) and a dreadnaught (High health, high damage, slow firerate ranged AoE, slow moving). The game would run on an income system, control the crystal mine entrances around the map to increase income. The humans would have a shotgun and machine gun turret, a barracks (train all units), an armory (upgrade damage, health, jet packs) and rope tethers (ropes go vertical by default , two tethers across a gap allows for horizontal travel. The insects get hives (spawn constant stream off grunts and trains each unit type), a mutation pool (upgrades like humans but also speed, and a jump ability (grunts to jump off walls to hit jetpacks), acid tower (very weak compare to human turrets but deals damage over time) and tunnels (fast way to travel around map).
Wow, even for a simple game this is a lot of description.