Connection to Theme: 3/5. Well, it's simply retro.
Enjoyment: 5/5. I love minesweeper in any form and played it a lot but this might be exactly what it lacked. I enjoyed combining thinking about the next minesweeper move to attack with thinking about the next character move to dodge.
Presentation: 3/5. It has a unique visual style and the music goes well with it but I don't really see what exact style it went for. If it was supposed to be pixel art, then it doesn't follow the pixel ratio at all. And if it wasn't supposed to be pixel art, then it's too pixelated.
Gameplay: 4/5. I like that the boss has several attack patterns but it doesn't change at all throughout the game so you get used to it pretty quickly and dodge on muscle memory alone.
Creativity: 5/5. It's just a great idea. I mean, the idea of boss fights in Minesweeper wasn't born today but it's the first time I see someone do it right.