Stickvania is a stick-figure demake of Konami's original Castlevania for the Nintendo Entertainment System. The game reduces the castle, enemies, objects, and Simon Belmont himself to simple line drawings that look like they were scribbled with a Sharpie.
> In practice, IL programs direct the agent to construct a pile near the origin that progressively grows taller and wider. That being the case, it can work with a Tetris implementation that defines “row infinity” as a finite row whose index increases as a function of the number of spawns. In such an implementation, the agent emulates a semihard drop with a finite number of soft drops.
For the method described in the paper to work, the infinite version of the game requires a semihard drop operation or something analogous as a legal move. In modern versions of Tetris, the rotation systems permit very unusual operations such as wall climbing or infinite lock delays, not to mention rotating in physically impossible ways. A semihard drop is not a big ask on an infinite playfield. It's within the spirit of the game.
