# Concept
* DOTA style game but without the heroes (just the creeps) and only in single-player mode (asymetric, not just one player against an AI who can do the same things as the player and has to beat the player).
* setting: science-fiction on the boundary between an asteroid and space
* display of the game world: 2D (or 2.5D) like Factorio
* Game world has a fixed height but can be scrolled horizontally, the asteroid's surface is on the left and space is on the right.
* The player builds a Factorio style factory on the asteroid. On the edge of the asteroid the player can build shipyards. The factory supplies the shipyards with the required parts to build ships. 
* The ships travel in space to defeat incoming enemy waves (which travels from the right to the left)
* the player owns some small defence stations (drawn twice as big as the spaceship units) positioned in space at some distance to the asteroid that engage incoming enemies (like the towers in a dota match). These stations can be destroyed.
* the amount and strength of the incoming enemy increases over time.
* the enemy also owns a pair of defence stations positioned at some distance to the right of the player's defence stations. the player can scroll horizontally only to those defence stations. if destroyed by the player's ships, the enemy strength (thread level) gets doubled (starting with the next wave) and the scrollable area gets extended by a bit and a new set of defence stations (twice as strong as the old ones) is placed at the edge of the scrollable area.
* defence stations drop loot maxbe ship blueprints or Parts blueprints
* resourses are gathered by own ships as Scrap
* Scrap can be smelted to base mats
* base mats can be mined from asteroid
* building blocks xan be produced from mats
* building blocks are spent to build
* buildings are built in the order they are placed. Building takes time. Only one building at a time
* waves spawn every x seconds
* goal is to survive for as long as possible
* time shall be displayed
* number of tile Columbus on asteroid.is configurable
* unlock more asteroid tiles to the left for building . How?