Touhou Koumakyou: The Embodiment of Scarlet Devil offers players the choice between two unique characters, each with distinct Spell Card types. Reimu Hakurei excels in covering a wide area with weaker attacks, while Marisa Kirisame relies on speed and power for more focused attacks. The game introduces varied bomb mechanics that differ based on the character and Spell Card type selected.

Distinguishing itself from its predecessor, Mystic Square, this installment introduces convenient features like automatic item collection for full power and a counter-bomb system to evade fatal hits. With six engaging stages in the main game, players exploring the Easy mode will conclude their journey after Stage 5.