I liked it, it was really fun!
I also think it fits well as a metroidvania, and another detail I liked is that it has a minimap, it helped me find my way around the game
Things that I believe need some improvements: The sound effect of the shot seems a little loud, the Shift key to shoot is not very comfortable as it calls up a window popup and the shield is not very clear as to how it works
Congratulations on the game, it was cool :)