Love the review (I could read it using Google translate) you really cover everything and i'm glad my intentions for the game where understood by you and captured in the review.
With CRT and Scanline filters are interesting suggestions and i think it would be possible to include a feature like that.
99% of the sounds in the game where created by me using an Alesis Micron synthesiser but i drew inspiration from sounds of the past to make them. The three sounds I didn't make were the dragon roars, a cheer effect and a whistle sample. But they are public domain sounds.