I'm glad you liked the game! And don't worry, you didn't accidentally speedrun it, that is more or less the entire game. I wanted to add more features (I agree, some music would've definitely been a nice touch), but due to the limitations of Octo and Chip-8, I needed to cram the game's code (excluding map data, sprites and sfx) into less than 4 kilobytes, otherwise it wouldn't work. Unfortunately, I didn't consider music to be all that integral to gameplay, so I chose to cut it.