Hi there, thank you for posting up a fun game to play. No story = no fancy ending ;)
Anyhow, there was quite a bit of backtracking involved, but it was never boring because each floor had a few items to pick up, and thankfully the shopkeeper sells the same things on each floor.
The fact that there are infinite lives for the player made this game more relaxed towards mistakes, which helped as I kept dying to the bullet-shooting monsters :p
Thank you for making this game, and I look forward to what you'll release in the future :)