Well done, cool game idea.
I really liked the 'combat' sections, but would have appreciated less punishment for errors. In the later stages, I had a few instances where a key changed right before I pressed it, causing some frustrations because it felt unfair.
The animations and classic style audio were all spot on and gave the game a cool retro feel. I really appreciated it.
Side note - linking to a fixed version of the game during a jam is against the jam rules and may disqualify you from ratings. You're welcome to update after the jam is done, but sharing it during might sway raters and is frowned upon.
Regardless of bugs, you still made a cool game in a week. Be proud of that and update it after the review period.