Things that could improve the game in my opinion:
- Make the player go a little slower, I could zoom past every room in 2seconds
- When the player is hit, start a cooldown until the player can take damage again.
- Also I would put a cooldown on the sword so it can't be spammed
- There was too many hearths all over the place it felt like I was in godmode
Conclusion: Very nice game, i had fun playing it! I really liked the glass dungeon theme, its surprising how much good music can increase a game's value!