This was a lot of fun! I really love the nostalgic Metroid feel the game had, and the gameplay was really good as well. I can tell you're passionate about metroidvanias. I think the only thing I would have to say is that there were some areas that I got stuck in because I didn't have the right keys to open certain doors and I couldn't climb back up to where I was, so I would have to restart my game. Still, I can tell you put a lot of time and effort into the gameplay, and it's so much fun exploring around and finding new items I haven't found before! Keep it up, this is great!!