Level tile graphics come from the prototype ROMs themselves, sprites can be drawn with either the
in-ROM's render or retail graphics. In-ROM render may have small visual errors. ys_romX_0 (built December 6, 1994) — 115 levels ys_rom_0_D (December 19, 1994) — 140 levels, of which
110 changed or new from ys_romX_0. Levels are grouped by the prototype's own
level select with subrooms. ≈ Jun-95 marks levels whose design survived into the near-final June 1995 build.
The final section shows the seven June 1995 levels that still differ from the released game.
ys_romX_0 — December 6, 1994 115 recordsIntroduction Level 1