The Biten sprite is really nice. You've got the Terraria style down pat as well! I've never thought about how a bullet heaven game as a 2D side scroller would be pretty fun. Gotta give extra points for the [BITEN BLAST] as well although it doesn't feel as powerful as the staff. The world gen mechanic doesn't really do anything for the game although I know you were experimenting with enemies that interacting with the terrain which sounds like a cool concept. Overall great work!