An interesting faller-type game that truly nails the PSX visuals. The angel, the texture of the triangles, the mix of sprites, polygons, and 3D models really digs at the nostalgia.
Music is a verifiable banger while still being haunting enough to fit the surreal visuals.
As others have mentioned the objectives are unclear at first, either an intro or even a short description on the itch page would help a lot.
My only real complaint design wise is the bullets are all but a non-issue, as where hitting triangles is fairly difficult. More merciful hitboxes on the triangles but more bullet-hell like projectiles could turn this project into something truly special.
All in all I give REIZEN: doing 360s around God's messenger/10