Looks great, but... Why don't you want to implement a combat system and display enemies like in DOOM? I've seen examples of NES games that implement upscaling of sprites. In the same Family BASIC, people were able to implement this.
toma, will you be able to upload the NSF file of this game separately, or is it impossible due to agreements with Interabang?
I would really like to listen to the original tracks on the emulator, not in the game itself.