This reminds me of old DOS games or something like that. Definitely a nice game! One small nitpick though: In the blueprint, there's a height shown. But I have no idea to how much that relates in the game world! You could maybe add a ruler or something (or something else entirely) to show the scale of the game screen.
Also a funny bug I noticed: If you destroy the first block completely, then the game gives you such a bad score it loops around to giving you an SS rank!
