Games like Takkoman

If you finished Takkoman, the closest matches are Touhou Luna Nights, Touhou Koumakyou: The Embodiment of Scarlet Devil, Koumajou Remilia Ⅱ: Stranger's Requiem, Touhou Makuka Sai: Fantastic Danmaku Festival and MarisaLand Legacy. All 9 share its adventure genre and are ranked by how closely their themes and modes overlap.