Fun game! It took me quite a while to figure out how the revive mechanic worked. I think it would have been nice to show the player what's happening in that section. Maybe give the slimes different colors, and when you revive, you take on the color of the one you revived? The enemies were a bit hard as well. 10 hits feels like it's too many, especially considering they're basically stunlocked while you're shooting them. It's no more difficult if it's 10 hits vs 3 hits when they can't move, so it might as well be 3 hits. The boss seemed a bit difficult as well, especially when down to one health. The fact that the smaller version of the boss grows in size when you hit it and at some random point when the sequence is over made it pretty difficult to want to engage with it during that move, and I found myself just waiting it out until it does the other move where it goes around the room once.
The audio and visuals were great, and the platforming was fun!