Numbers Go Up is 2048 reimagined as a hardcore roguelike deckbuilder. you play the grid, beat a score target, then walk into a black-market bazaar and buy contraband programs that change how the game works.
TLDR: the tiles. when you merge into a tile, it gets added to your spawn pool, or "deck". each tile in your spawn pool rolls to be spawned after every move, and the default chances are [1 in tile value]. for example, a [2] spawns every [1 in 2] spawns, or 50% of the time, or a 64 spawns [1 in 64] or ~1.5% of the time. you can fix your deck by adjusting this probability until one or more tiles always spawn for you - using certain programs (called renice and unlink) or mods like oops all 4s. You can further customize and build towards a certain value and enhancement combo and REALLY start breaking the game's number system.
Enjoy, and see you in PVP!
Sam